Textmodule widget: dynamically increase width

Only use as much space as needed but allow the dropdown to grow as big as possible (textarea width) to show as much as possible of the text module name.

app/assets/javascripts/app/lib/base/jquery.textmodule.js

@@ -20,15 +20,14 @@
 
     this.options    = $.extend({}, defaults, options)
 
-    this._defaults  = defaults
-    this._name      = pluginName
+    this._defaults   = defaults
+    this._name       = pluginName
+    this._fixedWidth = true
 
     this.collection = []
     this.active     = false
     this.buffer     = ''
 
-    this._width = 380
-
     // check if ce exists
     if ( $.data(element, 'plugin_ce') ) {
       this.ce = $.data(element, 'plugin_ce')
@@ -194,6 +193,7 @@
 
   // create base template
   Plugin.prototype.renderBase = function() {
+    this.untouched = true
     this.$element.after('<div class="shortcut dropdown"><ul class="dropdown-menu" style="max-height: 200px;"></ul></div>')
     this.$widget = this.$element.next()
     this.$widget.on('mousedown', 'li', $.proxy(this.onEntryClick, this))
@@ -209,19 +209,19 @@
     var top            = -( widgetHeight + height ) + this._position.top
     var start          = this._position.left - 6
     var availableWidth = this.$element.innerWidth()
+    var width          = this.$widget.find('.dropdown-menu').width()
 
     if(rtl){
       start = availableWidth - start
     }
 
     // position the element further left if it would break out of the textarea width
-    if (start + this._width > availableWidth) {
-      start = this.$element.innerWidth() - this._width
+    if (start + width > availableWidth) {
+      start = availableWidth - width
     }
 
     var css = {
-      top: top,
-      width: this._width
+      top: top
     }
 
     css[rtl ? 'right' : 'left'] = start
@@ -417,6 +417,13 @@
     }
 
     this.$widget.find('ul').append(elements).scrollTop(9999)
+
+    // keep the width of the dropdown the same even when longer items got filtered out
+    if(this._fixedWidth && this.untouched){
+      this.$widget.find('ul').css('width', this.$widget.find('ul').width());
+      this.untouched = false;
+    }
+
     this.movePosition()
   }
 

app/assets/stylesheets/zammad.scss

@@ -5188,6 +5188,7 @@ footer {
   overflow: auto;
   position: absolute;
   max-width: 100%;
+  min-width: 0;
 }
 
 .editControls {