* @cfg {String/Object} params When used with {@link #url}, calls {@link #setUrl} with this value
* @cfg {Boolean} loadOnce When used with {@link #url}, calls {@link #setUrl} with this value
* @cfg {String} content Raw content to fill content panel with (uses setContent on construction.)
+ * @cfg {Boolean} iframe contents are an iframe - makes showing remote sources/CSS feasible..
* @cfg {Boolean} badges render the badges
* @cfg {String} cls extra classes to use
* @cfg {String} background (primary|secondary|success|info|warning|danger|light|dark)
tabTip : '',
+ iframe : false,
+
setRegion : function(region){
this.region = region;
this.setActiveClass(region && !this.background);