Category settings: Fix test for parent category mistaking all top level categories for parents

Only categories with children should be treated as parents, not all top level categories

Author: rjmackay

app/settings/categories/edit.controller.js

@@ -102,7 +102,7 @@ function (
                 $scope.category.parent_id_original = $scope.category.parent.id;
                 delete $scope.category.parent;
             }
-            if (!$scope.category.parent_id) {
+            if ($scope.category.children && $scope.category.children.length) {
                 $scope.isParent = true;
             }
         });