Fixed Multiselect dropdown so that an empty value also gets saved.

e107_web/js/bootstrap-multiselect/js/bootstrap-multiselect.js

@@ -3,6 +3,7 @@
  * https://github.com/davidstutz/bootstrap-multiselect
  *
  * Copyright 2012 David Stutz
+ * Modified Dec 2019 by e107
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

e107_web/js/core/admin.jquery.js

@@ -565,6 +565,7 @@ $(document).ready(function()
 		$("select.tbox").each(function() {
 			
 			var multi = $(this).attr('multiple');
+			var tagName = $(this).attr('name');
 
 			if(multi === undefined)
 			{
@@ -573,7 +574,27 @@ $(document).ready(function()
 			}
 			else
 			{
-				$(this).multiselect({ buttonClass: 'btn btn-default'} );
+				$(this).multiselect({
+					buttonClass: 'btn btn-default',
+					 buttonText: function(options) {
+						if (options.length == 0) {
+
+							return '(Optional) <b class="caret"></b><input type="hidden" name="' + tagName + '" value="" />'; // send empty value to server so value is saved.
+						}
+						else if (options.length > 5) {
+							return options.length + ' selected <b class="caret"></b>';
+						}
+						else {
+							var selected = '';
+							options.each(function() {
+								selected += $(this).text() + ', ';
+							});
+							return selected.substr(0, selected.length -2) + ' <b class="caret"></b>';
+						}
+					},
+
+
+					});
 			}