Remove all whitespace when parsing MNTP allowed doctypes.

src/Umbraco.Web.UI.Client/src/views/common/dialogs/treepicker.controller.js

@@ -259,7 +259,7 @@ angular.module("umbraco").controller("Umbraco.Dialogs.TreePickerController",
 	                }
 	            });
 	        } else {
-	            var a = dialogOptions.filter.toLowerCase().split(',');
+	            var a = dialogOptions.filter.toLowerCase().replace(/\s/g, '').split(',');
 	            angular.forEach(nodes, function (value, key) {
 
 	                var found = a.indexOf(value.metaData.contentType.toLowerCase()) >= 0;