Fixes tabdrop memory leak U4-6907 Bootstrap tab drop has memory leaks, fixes tab/header to use the correct bootstrap tab api, simplifies the header code dramatically and speeds up processing. Fixes mem leak with delayedMouseLeave.directive

src/Umbraco.Web.UI.Client/lib/bootstrap-tabdrop/README.md

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+bootstrap-tabdrop
+=================
+
+*****************************************************************
+NOTE: THIS IS A CUSTOM FIXED VERSION!!!!!!!!!!!!!!!!!!!!!!
+- THE ORIGINAL HAS A MEMORY LEAK, SO WE'VE HAD TO EMBED THIS 
+  INTO THE CORE WITH THE FIX
+
+--- UMBRACO CORE TEAM
+*****************************************************************
+
+A dropdown tab tool for @twitter bootstrap forked from Stefan Petre's (of eyecon.ro),
+
+The dropdown tab appears when your tabs do not all fit in the same row.
+
+Original site and examples: http://www.eyecon.ro/bootstrap-tabdrop/
+
+Added functionality: Displays the text of an active tab selected from the dropdown list instead of the text option on the dropdown tab.
+
+
+## Requirements
+
+* [Bootstrap](http://twitter.github.com/bootstrap/) 2.0.4+
+* [jQuery](http://jquery.com/) 1.7.1+
+
+## Example
+
+No additional HTML needed - the script adds it when the dropdown tab is needed.
+
+Using bootstrap-tabdrop.js
+Call the tab drop via javascript on .nav-tabs and .nav-pills:
+```js
+$('.nav-pills, .nav-tabs').tabdrop()
+```
+
+### Options
+
+#### text
+Type: string
+Default: icon
+```html
+<i class="icon-align-justify"></i>
+```
+To change the default value, call
+```javascript
+.tabdrop({text: "your text here"});
+```
+when initalizing the tabdrop. The displayed value will change when a tab is selected from the dropdown list.
+
+### Methods
+
+```js
+.tabdrop(options)
+```
+
+Initializes an tab drop.
+
+```js
+.tabdrop('layout')
+```
+
+Checks if the tabs fit in one single row.

src/Umbraco.Web.UI.Client/lib/bootstrap-tabdrop/bootstrap-tabdrop.js

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+/* =========================================================
+ * bootstrap-tabdrop.js
+ * http://www.eyecon.ro/bootstrap-tabdrop
+ * =========================================================
+ * Copyright 2012 Stefan Petre
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================================================= */
+
+/*****************************************************************
+ * NOTE: THIS IS A CUSTOM FIXED VERSION!!!!!!!!!!!!!!!!!!!!!!
+ * - THE ORIGINAL HAS A MEMORY LEAK, SO WE'VE HAD TO EMBED THIS 
+ * INTO THE CORE WITH THE FIX
+ * 
+ * --- UMBRACO CORE TEAM
+ *****************************************************************/
+
+!function( $ ) {
+
+	var WinReszier = (function(){
+		var registered = [];
+		var inited = false;
+		var timer;
+		var resize = function(ev) {
+			clearTimeout(timer);
+			timer = setTimeout(notify, 100);
+		};
+		var notify = function() {
+			for(var i=0, cnt=registered.length; i<cnt; i++) {
+				registered[i].apply();
+			}
+		};
+		return {
+			register: function(fn) {
+				registered.push(fn);
+				if (inited === false) {
+					$(window).bind('resize', resize);
+					inited = true;
+				}
+			},
+			unregister: function(fn) {
+			    var index = registered.indexOf(fn);
+			    if (index > -1) {
+			        registered.splice(index, 1);
+			    }
+			}
+		};
+	}());
+
+	var TabDrop = function(element, options) {
+		this.element = $(element);
+		this.dropdown = $('<li class="dropdown hide pull-right tabdrop">' +
+				'<a class="dropdown-toggle" data-toggle="dropdown" href="#">' +
+				options.text + ' <b class="caret"></b></a>' +
+				'<ul class="dropdown-menu"></ul></li>').prependTo(this.element);
+		if (this.element.parent().is('.tabs-below')) {
+			this.dropdown.addClass('dropup');
+		}
+	    this.resizeCallback = $.proxy(this.layout, this);
+	    WinReszier.register(this.resizeCallback);
+		this.layout();
+	};
+
+	TabDrop.prototype = {
+		constructor: TabDrop,
+
+		layout: function() {
+			var collection = [];
+			this.dropdown.removeClass('hide');
+			this.element
+				.append(this.dropdown.find('li'))
+				.find('>li')
+				.not('.tabdrop')
+				.each(function(){
+					if(this.offsetTop > 0) {
+						collection.push(this);
+					}
+				});
+			if (collection.length > 0) {
+				collection = $(collection);
+				this.dropdown
+					.find('ul')
+					.empty()
+					.append(collection);
+				if (this.dropdown.find('.active').length == 1) {
+					this.dropdown.addClass('active');
+				} else {
+					this.dropdown.removeClass('active');
+				}
+			} else {
+				this.dropdown.addClass('hide');
+			}
+		},
+
+        destroy: function() {
+            this.dropdown.html();
+            WinReszier.unregister(this.resizeCallback);
+        }
+	};
+
+	$.fn.tabdrop = function ( option ) {
+		return this.each(function () {
+			var $this = $(this),
+				data = $this.data('tabdrop'),
+				options = typeof option === 'object' && option;
+			if (!data)  {
+				$this.data('tabdrop', (data = new TabDrop(this, $.extend({},
+											$.fn.tabdrop.defaults,options))));
+			}
+			if (typeof option == 'string') {
+			    data[option]();
+			}
+		});
+	};
+
+	$.fn.tabdrop.defaults = {
+		text: '<i class="icon-align-justify"></i>'
+	};
+
+	$.fn.tabdrop.Constructor = TabDrop;
+
+}(window.jQuery);