closes #3687

public/less/admin/manage/categories.less

@@ -82,4 +82,11 @@ div.categories {
 	.description {
 		margin: 0;
 	}
+
+	.children-placeholder{
+		border: 1px dashed #ddd;
+		min-height: 20px;
+		height: 20px;
+	}
+
 }

public/src/admin/manage/categories.js

@@ -153,10 +153,8 @@ define('admin/manage/categories', ['vendor/jquery/serializeObject/jquery.ba-seri
 
 			// Handle and children categories in this level have
 			for(var x=0,numCategories=categories.length;x<numCategories;x++) {
-				if (categories[x].hasOwnProperty('children') && categories[x].children.length > 0) {
 				renderList(categories[x].children, $('li[data-cid="' + categories[x].cid + '"]'), categories[x].cid);
 			}
-			}
 
 			// Make list sortable
 			sortables[parentId] = Sortable.create($('ul[data-cid="' + parentId + '"]')[0], {

src/views/admin/partials/categories/category-rows.tpl

@@ -26,4 +26,7 @@
         </div>
     </li>
 <!-- END categories -->
+
+<li class="children-placeholder"></li>
+
 </ul>