fix removing filters that no longer exist

add a filtercreate event

deluge/ui/web/js/deluge-all/Sidebar.js

@@ -109,6 +109,7 @@
         
             this.doLayout();
             this.panels[filter] = panel;
+			this.fireEvent('filtercreate', this, panel);
         },
     
         getFilters: function() {
@@ -164,7 +165,9 @@
             Ext.each(Ext.keys(this.panels), function(filter) {
                 if (Ext.keys(filters).indexOf(filter) == -1) {
                     // We need to remove the panel
-                    this.panels[filter]
+                    this.remove(this.panels[filter]);
+					this.doLayout();
+					delete this.panels[filter];
                 }
             }, this);
         },