Add rounded corners to QR code.

src/_h5ai/client/css/inc/qrcode.less

@@ -8,6 +8,7 @@
 
     background-color: @col-widget-back;
     border: @border-widget;
+    border-radius: 8px;
     padding: 8px;
 
     canvas {

src/_h5ai/client/js/inc/ext/qrcode.js

@@ -16,6 +16,7 @@ modulejs.define('ext/qrcode', ['_', '$', 'modernizr', 'core/settings', 'core/eve
             height: settings.size,
             color: '#333',
             bgColor: '#fff',
+            radius: 0.5,
             text: window.location.protocol + '//' + window.location.host + item.absHref
         });
     }