diff --git a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-debug.js b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-debug.js
index 44d860f432f..1b9bc93ea81 100644
--- a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-debug.js
+++ b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-debug.js
@@ -40,7 +40,8 @@ var DIALOGUE_NAME = 'Moodle dialogue',
     DIALOGUE_HIDDEN_CLASS = DIALOGUE_PREFIX + '-hidden',
     DIALOGUE_SELECTOR =' [role=dialog]',
     MENUBAR_SELECTOR = '[role=menubar]',
-    HAS_ZINDEX = '.moodle-has-zindex',
+    DOT = '.',
+    HAS_ZINDEX = 'moodle-has-zindex',
     CAN_RECEIVE_FOCUS_SELECTOR = 'input:not([type="hidden"]), a[href], button, textarea, select, [tabindex]';
 
 /**
@@ -121,6 +122,7 @@ Y.extend(DIALOGUE, Y.Panel, {
         // Workaround upstream YUI bug http://yuilibrary.com/projects/yui3/ticket/2532507
         // and allow setting of z-index in theme.
         bb = this.get('boundingBox');
+        bb.addClass(HAS_ZINDEX);
 
         // Add any additional classes that were specified.
         Y.Array.each(this.get('extraClasses'), bb.addClass, bb);
@@ -162,7 +164,7 @@ Y.extend(DIALOGUE, Y.Panel, {
             bb.setStyle('zIndex', zindex);
         } else {
             // Determine the correct zindex by looking at all existing dialogs and menubars in the page.
-            Y.all(DIALOGUE_SELECTOR+', '+MENUBAR_SELECTOR+', '+HAS_ZINDEX).each(function (node) {
+            Y.all(DIALOGUE_SELECTOR + ', ' + MENUBAR_SELECTOR + ', ' + DOT + HAS_ZINDEX).each(function (node) {
                 var zindex = this.findZIndex(node);
                 if (zindex > highestzindex) {
                     highestzindex = zindex;
diff --git a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-min.js b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-min.js
index 171c5bcaac4..57eddc5a880 100644
--- a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-min.js
+++ b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-min.js
@@ -1,2 +1,2 @@
-YUI.add("moodle-core-notification-dialogue",function(e,t){var n,r,i,s,o,u,a;n="moodle-dialogue",r="notificationBase",i="yesLabel",s="noLabel",o="title",u="question",a={BASE:"moodle-dialogue-base",WRAP:"moodle-dialogue-wrap",HEADER:"moodle-dialogue-hd",BODY:"moodle-dialogue-bd",CONTENT:"moodle-dialogue-content",FOOTER:"moodle-dialogue-ft",HIDDEN:"hidden",LIGHTBOX:"moodle-dialogue-lightbox"},M.core=M.core||{};var f="Moodle dialogue",l,c=n+"-fullscreen",h=n+"-hidden",p=" [role=dialog]",d="[role=menubar]",v=".moodle-has-zindex",m='input:not([type="hidden"]), a[href], button, textarea, select, [tabindex]';l=function(t){var n=e.clone(t);n.COUNT=e.stamp(this);var r="moodle-dialogue-"+n.COUNT;n.notificationBase=e.Node.create('<div class="'+a.BASE+'">').append(e.Node.create('<div id="'+r+'" role="dialog" aria-labelledby="'+r+'-header-text" class="'+a.WRAP+'"></div>').append(e.Node.create('<div id="'+r+'-header-text" class="'+a.HEADER+' yui3-widget-hd"></div>')).append(e.Node.create('<div class="'+a.BODY+' yui3-widget-bd"></div>')).append(e.Node.create('<div class="'+a.FOOTER+' yui3-widget-ft"></div>'))),e.one(document.body).append(n.notificationBase),n.additionalBaseClass&&n.notificationBase.addClass(n.additionalBaseClass),n.srcNode="#"+r,n.closeButton===!1?n.buttons=null:n.buttons=[{section:e.WidgetStdMod.HEADER,classNames:"closebutton",action:function(){this.hide()}}],l.superclass.constructor.apply(this,[n]),n.closeButton!==!1&&this.get("buttons").header[0].setAttribute("title",this.get("closeButtonTitle"))},e.extend(l,e.Panel,{_resizeevent:null,_orientationevent:null,_calculatedzindex:!1,initializer:function(){var t;this.get("render")&&this.render(),this.makeResponsive(),this.after("visibleChange",this.visibilityChanged,this),this.get("center")&&this.centerDialogue(),this.get("modal")&&this.plug(e.M.core.LockScroll),t=this.get("boundingBox"),e.Array.each(this.get("extraClasses"),t.addClass,t),this.get("visible")&&this.applyZIndex(),this.on("maskShow",this.applyZIndex),this.get("visible")&&(this.show(),this.keyDelegation()),this.after("destroyedChange",function(){this.get(r).remove(!0)},this)},applyZIndex:function(){var t=1,n=1,r=this.get("boundingBox"),i=this.get("maskNode"),s=this.get("zIndex");s!==0&&!this._calculatedzindex?r.setStyle("zIndex",s):(e.all(p+", "+d+", "+v).each(function(e){var n=this.findZIndex(e);n>t&&(t=n)},this),n=(t+1).toString(),r.setStyle("zIndex",n),this.set("zIndex",n),this.get("modal")&&i.setStyle("zIndex",n),this._calculatedzindex=!0)},findZIndex:function(e){var t=e.getStyle("zIndex")||e.ancestor().getStyle("zIndex");return t?parseInt(t,10):0},visibilityChanged:function(t){var n,r;t.attrName==="visible"&&(this.get("maskNode").addClass(a.LIGHTBOX),t.prevVal&&!t.newVal&&(r=this.get("boundingBox"),this._resizeevent&&(this._resizeevent.detach(),this._resizeevent=null),this._orientationevent&&(this._orientationevent.detach(),this._orientationevent=null),r.detach("key",this.keyDelegation)),!t.prevVal&&t.newVal&&(this.applyZIndex(),this.makeResponsive(),this.shouldResizeFullscreen()||this.get("draggable")&&(n="#"+this.get("id")+" ."+a.HEADER,this.plug(e.Plugin.Drag,{handles:[n]}),e.one(n).setStyle("cursor","move")),this.keyDelegation()),this.get("center")&&!t.prevVal&&t.newVal&&this.centerDialogue())},makeResponsive:function(){var t=this.get("boundingBox"),n;this.shouldResizeFullscreen()?(t.addClass(c),t.setStyles({left:null,top:null,width:null,height:null,right:null,bottom:null}),n=e.one("#"+this.get("id")+" ."+a.BODY)):this.get("responsive")&&(t.removeClass(c).setStyles({width:this.get("width"),height:this.get("height")}),n=e.one("#"+this.get("id")+" ."+a.BODY))},centerDialogue:function(){var t=this.get("boundingBox"),n=t.hasClass(h),r,i;if(this.shouldResizeFullscreen())return;n&&t.setStyle("top","-1000px").removeClass(h),r=Math.max(Math.round((t.get("winWidth")-t.get("offsetWidth"))/2),15),i=Math.max(Math.round((t.get("winHeight")-t.get("offsetHeight"))/2),15)+e.one(window).get("scrollTop"),t.setStyles({left:r,top:i}),n&&t.addClass(h)},shouldResizeFullscreen:function(){return window===window.parent&&this.get("responsive")&&Math.floor(e.one(document.body).get("winWidth"))<this.get("responsiveWidth")},show:function(){var e=null,t=this.headerNode,n=this.bodyNode,r=this.get("focusOnShowSelector"),i=null;return e=l.superclass.show.call(this),this.lockScroll&&this.lockScroll.enableScrollLock(this.shouldResizeFullscreen()),r!==null&&(i=this.get("boundingBox").one(r)),i||(t&&t!==""?i=t:n&&n!==""&&(i=n)),i&&i.focus(),e},hide:function(e){if(e&&e.type==="key"&&e.keyCode===27&&!this.get("focused"))return;return this.lockScroll&&this.lockScroll.disableScrollLock(),l.superclass.hide.call(this,arguments)},keyDelegation:function(){var e=this.get("boundingBox");e.delegate("key",function(e){var t=e.target,n="forward";e.shiftKey&&(n="backward"),this.trapFocus(t,n)&&e.preventDefault()},"down:9",m,this)},trapFocus:function(e,t){var n=this.get("boundingBox"),r=n.one(m),i=n.all(m).pop();if(e===i&&t==="forward")return r.focus();if(e===r&&t==="backward")return i.focus()}},{NAME:f,CSS_PREFIX:n,ATTRS:{notificationBase:{},lightbox:{lazyAdd:!1,setter:function(e){this.set("modal",e)}},closeButton:{validator:e.Lang.isBoolean,value:!0},closeButtonTitle:{validator:e.Lang.isString,value:M.util.get_string("closebuttontitle","moodle")},center:{validator:e.Lang.isBoolean,value:!0},draggable:{validator:e.Lang.isBoolean,value:!1},COUNT:{value:null},responsive:{validator:e.Lang.isBoolean,value:!0},responsiveWidth:{value:768},focusOnShowSelector:{value:null}}}),e.Base.modifyAttrs(l,{width:{value:"400px",setter:function(e){return e==="auto"?"":e}},visible:{value:!1},centered:{setter:function(e){return e&&this.set("center",!0),!1}},render:{value:!0,writeOnce:!0},extraClasses:{value:[]}}),e.Base.mix(l,[e.M.core.WidgetFocusAfterHide]),M.core.dialogue=l;var g=function(){g.superclass.constructor.apply(this,arguments)};e.extend(g,M.core.dialogue,{},{NAME:"Moodle information dialogue",CSS_PREFIX:n}),e.Base.modifyAttrs(g,
-{visible:{value:!0},modal:{validator:e.Lang.isBoolean,value:!0}}),M.core.notification=M.core.notification||{},M.core.notification.info=g},"@VERSION@",{requires:["base","node","panel","escape","event-key","dd-plugin","moodle-core-widget-focusafterclose","moodle-core-lockscroll"]});
+YUI.add("moodle-core-notification-dialogue",function(e,t){var n,r,i,s,o,u,a;n="moodle-dialogue",r="notificationBase",i="yesLabel",s="noLabel",o="title",u="question",a={BASE:"moodle-dialogue-base",WRAP:"moodle-dialogue-wrap",HEADER:"moodle-dialogue-hd",BODY:"moodle-dialogue-bd",CONTENT:"moodle-dialogue-content",FOOTER:"moodle-dialogue-ft",HIDDEN:"hidden",LIGHTBOX:"moodle-dialogue-lightbox"},M.core=M.core||{};var f="Moodle dialogue",l,c=n+"-fullscreen",h=n+"-hidden",p=" [role=dialog]",d="[role=menubar]",v=".",m="moodle-has-zindex",g='input:not([type="hidden"]), a[href], button, textarea, select, [tabindex]';l=function(t){var n=e.clone(t);n.COUNT=e.stamp(this);var r="moodle-dialogue-"+n.COUNT;n.notificationBase=e.Node.create('<div class="'+a.BASE+'">').append(e.Node.create('<div id="'+r+'" role="dialog" aria-labelledby="'+r+'-header-text" class="'+a.WRAP+'"></div>').append(e.Node.create('<div id="'+r+'-header-text" class="'+a.HEADER+' yui3-widget-hd"></div>')).append(e.Node.create('<div class="'+a.BODY+' yui3-widget-bd"></div>')).append(e.Node.create('<div class="'+a.FOOTER+' yui3-widget-ft"></div>'))),e.one(document.body).append(n.notificationBase),n.additionalBaseClass&&n.notificationBase.addClass(n.additionalBaseClass),n.srcNode="#"+r,n.closeButton===!1?n.buttons=null:n.buttons=[{section:e.WidgetStdMod.HEADER,classNames:"closebutton",action:function(){this.hide()}}],l.superclass.constructor.apply(this,[n]),n.closeButton!==!1&&this.get("buttons").header[0].setAttribute("title",this.get("closeButtonTitle"))},e.extend(l,e.Panel,{_resizeevent:null,_orientationevent:null,_calculatedzindex:!1,initializer:function(){var t;this.get("render")&&this.render(),this.makeResponsive(),this.after("visibleChange",this.visibilityChanged,this),this.get("center")&&this.centerDialogue(),this.get("modal")&&this.plug(e.M.core.LockScroll),t=this.get("boundingBox"),t.addClass(m),e.Array.each(this.get("extraClasses"),t.addClass,t),this.get("visible")&&this.applyZIndex(),this.on("maskShow",this.applyZIndex),this.get("visible")&&(this.show(),this.keyDelegation()),this.after("destroyedChange",function(){this.get(r).remove(!0)},this)},applyZIndex:function(){var t=1,n=1,r=this.get("boundingBox"),i=this.get("maskNode"),s=this.get("zIndex");s!==0&&!this._calculatedzindex?r.setStyle("zIndex",s):(e.all(p+", "+d+", "+v+m).each(function(e){var n=this.findZIndex(e);n>t&&(t=n)},this),n=(t+1).toString(),r.setStyle("zIndex",n),this.set("zIndex",n),this.get("modal")&&i.setStyle("zIndex",n),this._calculatedzindex=!0)},findZIndex:function(e){var t=e.getStyle("zIndex")||e.ancestor().getStyle("zIndex");return t?parseInt(t,10):0},visibilityChanged:function(t){var n,r;t.attrName==="visible"&&(this.get("maskNode").addClass(a.LIGHTBOX),t.prevVal&&!t.newVal&&(r=this.get("boundingBox"),this._resizeevent&&(this._resizeevent.detach(),this._resizeevent=null),this._orientationevent&&(this._orientationevent.detach(),this._orientationevent=null),r.detach("key",this.keyDelegation)),!t.prevVal&&t.newVal&&(this.applyZIndex(),this.makeResponsive(),this.shouldResizeFullscreen()||this.get("draggable")&&(n="#"+this.get("id")+" ."+a.HEADER,this.plug(e.Plugin.Drag,{handles:[n]}),e.one(n).setStyle("cursor","move")),this.keyDelegation()),this.get("center")&&!t.prevVal&&t.newVal&&this.centerDialogue())},makeResponsive:function(){var t=this.get("boundingBox"),n;this.shouldResizeFullscreen()?(t.addClass(c),t.setStyles({left:null,top:null,width:null,height:null,right:null,bottom:null}),n=e.one("#"+this.get("id")+" ."+a.BODY)):this.get("responsive")&&(t.removeClass(c).setStyles({width:this.get("width"),height:this.get("height")}),n=e.one("#"+this.get("id")+" ."+a.BODY))},centerDialogue:function(){var t=this.get("boundingBox"),n=t.hasClass(h),r,i;if(this.shouldResizeFullscreen())return;n&&t.setStyle("top","-1000px").removeClass(h),r=Math.max(Math.round((t.get("winWidth")-t.get("offsetWidth"))/2),15),i=Math.max(Math.round((t.get("winHeight")-t.get("offsetHeight"))/2),15)+e.one(window).get("scrollTop"),t.setStyles({left:r,top:i}),n&&t.addClass(h)},shouldResizeFullscreen:function(){return window===window.parent&&this.get("responsive")&&Math.floor(e.one(document.body).get("winWidth"))<this.get("responsiveWidth")},show:function(){var e=null,t=this.headerNode,n=this.bodyNode,r=this.get("focusOnShowSelector"),i=null;return e=l.superclass.show.call(this),this.lockScroll&&this.lockScroll.enableScrollLock(this.shouldResizeFullscreen()),r!==null&&(i=this.get("boundingBox").one(r)),i||(t&&t!==""?i=t:n&&n!==""&&(i=n)),i&&i.focus(),e},hide:function(e){if(e&&e.type==="key"&&e.keyCode===27&&!this.get("focused"))return;return this.lockScroll&&this.lockScroll.disableScrollLock(),l.superclass.hide.call(this,arguments)},keyDelegation:function(){var e=this.get("boundingBox");e.delegate("key",function(e){var t=e.target,n="forward";e.shiftKey&&(n="backward"),this.trapFocus(t,n)&&e.preventDefault()},"down:9",g,this)},trapFocus:function(e,t){var n=this.get("boundingBox"),r=n.one(g),i=n.all(g).pop();if(e===i&&t==="forward")return r.focus();if(e===r&&t==="backward")return i.focus()}},{NAME:f,CSS_PREFIX:n,ATTRS:{notificationBase:{},lightbox:{lazyAdd:!1,setter:function(e){this.set("modal",e)}},closeButton:{validator:e.Lang.isBoolean,value:!0},closeButtonTitle:{validator:e.Lang.isString,value:M.util.get_string("closebuttontitle","moodle")},center:{validator:e.Lang.isBoolean,value:!0},draggable:{validator:e.Lang.isBoolean,value:!1},COUNT:{value:null},responsive:{validator:e.Lang.isBoolean,value:!0},responsiveWidth:{value:768},focusOnShowSelector:{value:null}}}),e.Base.modifyAttrs(l,{width:{value:"400px",setter:function(e){return e==="auto"?"":e}},visible:{value:!1},centered:{setter:function(e){return e&&this.set("center",!0),!1}},render:{value:!0,writeOnce:!0},extraClasses:{value:[]}}),e.Base.mix(l,[e.M.core.WidgetFocusAfterHide]),M.core.dialogue=l;var y=function(){y.superclass.constructor.apply(this,arguments)};e.extend(y,M.core.dialogue,{},{NAME:"Moodle information dialogue",CSS_PREFIX:n}),
+e.Base.modifyAttrs(y,{visible:{value:!0},modal:{validator:e.Lang.isBoolean,value:!0}}),M.core.notification=M.core.notification||{},M.core.notification.info=y},"@VERSION@",{requires:["base","node","panel","escape","event-key","dd-plugin","moodle-core-widget-focusafterclose","moodle-core-lockscroll"]});
diff --git a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue.js b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue.js
index ea694755d77..680a56bef61 100644
--- a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue.js
+++ b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue.js
@@ -40,7 +40,8 @@ var DIALOGUE_NAME = 'Moodle dialogue',
     DIALOGUE_HIDDEN_CLASS = DIALOGUE_PREFIX + '-hidden',
     DIALOGUE_SELECTOR =' [role=dialog]',
     MENUBAR_SELECTOR = '[role=menubar]',
-    HAS_ZINDEX = '.moodle-has-zindex',
+    DOT = '.',
+    HAS_ZINDEX = 'moodle-has-zindex',
     CAN_RECEIVE_FOCUS_SELECTOR = 'input:not([type="hidden"]), a[href], button, textarea, select, [tabindex]';
 
 /**
@@ -121,6 +122,7 @@ Y.extend(DIALOGUE, Y.Panel, {
         // Workaround upstream YUI bug http://yuilibrary.com/projects/yui3/ticket/2532507
         // and allow setting of z-index in theme.
         bb = this.get('boundingBox');
+        bb.addClass(HAS_ZINDEX);
 
         // Add any additional classes that were specified.
         Y.Array.each(this.get('extraClasses'), bb.addClass, bb);
@@ -162,7 +164,7 @@ Y.extend(DIALOGUE, Y.Panel, {
             bb.setStyle('zIndex', zindex);
         } else {
             // Determine the correct zindex by looking at all existing dialogs and menubars in the page.
-            Y.all(DIALOGUE_SELECTOR+', '+MENUBAR_SELECTOR+', '+HAS_ZINDEX).each(function (node) {
+            Y.all(DIALOGUE_SELECTOR + ', ' + MENUBAR_SELECTOR + ', ' + DOT + HAS_ZINDEX).each(function (node) {
                 var zindex = this.findZIndex(node);
                 if (zindex > highestzindex) {
                     highestzindex = zindex;
diff --git a/lib/yui/src/notification/js/dialogue.js b/lib/yui/src/notification/js/dialogue.js
index 0a9320be325..2164009e06b 100644
--- a/lib/yui/src/notification/js/dialogue.js
+++ b/lib/yui/src/notification/js/dialogue.js
@@ -11,7 +11,8 @@ var DIALOGUE_NAME = 'Moodle dialogue',
     DIALOGUE_HIDDEN_CLASS = DIALOGUE_PREFIX + '-hidden',
     DIALOGUE_SELECTOR =' [role=dialog]',
     MENUBAR_SELECTOR = '[role=menubar]',
-    HAS_ZINDEX = '.moodle-has-zindex',
+    DOT = '.',
+    HAS_ZINDEX = 'moodle-has-zindex',
     CAN_RECEIVE_FOCUS_SELECTOR = 'input:not([type="hidden"]), a[href], button, textarea, select, [tabindex]';
 
 /**
@@ -92,6 +93,7 @@ Y.extend(DIALOGUE, Y.Panel, {
         // Workaround upstream YUI bug http://yuilibrary.com/projects/yui3/ticket/2532507
         // and allow setting of z-index in theme.
         bb = this.get('boundingBox');
+        bb.addClass(HAS_ZINDEX);
 
         // Add any additional classes that were specified.
         Y.Array.each(this.get('extraClasses'), bb.addClass, bb);
@@ -133,7 +135,7 @@ Y.extend(DIALOGUE, Y.Panel, {
             bb.setStyle('zIndex', zindex);
         } else {
             // Determine the correct zindex by looking at all existing dialogs and menubars in the page.
-            Y.all(DIALOGUE_SELECTOR+', '+MENUBAR_SELECTOR+', '+HAS_ZINDEX).each(function (node) {
+            Y.all(DIALOGUE_SELECTOR + ', ' + MENUBAR_SELECTOR + ', ' + DOT + HAS_ZINDEX).each(function (node) {
                 var zindex = this.findZIndex(node);
                 if (zindex > highestzindex) {
                     highestzindex = zindex;