Fixes detatch to only occur on dimmer when element is not inside dimmer

src/modules/dimmer.js

@@ -136,11 +136,11 @@ $.fn.dimmer = function(parameters) {
 
         addContent: function(element) {
           var
-            $content = $(element).detach()
+            $content = $(element)
           ;
           module.debug('Add content to dimmer', $content);
           if($content.parent()[0] !== $dimmer[0]) {
-            $dimmer.append($content);
+            $content.detach().appendTo($dimmer);
           }
         },