add support to set parentCid to 0

public/src/forum/admin/categories.js

@@ -239,6 +239,21 @@ define('forum/admin/categories', ['uploader', 'forum/admin/iconSelect'], functio
 				modal.find('select').val($(this).attr('data-parentCid'));
 				modal.attr('data-cid', cid).modal();
 			});
+
+			$('button[data-action="removeParent"]').on('click', function() {
+				var cid = $(this).parents('[data-cid]').attr('data-cid');
+				var payload= {};
+				payload[cid] = {
+					parentCid: 0
+				};
+				socket.emit('admin.categories.update', payload, function(err) {
+					if (err) {
+						return app.alertError(err.message);
+					}
+					ajaxify.go('admin/categories/active');
+				});
+			});
+
 			$('#setParent [data-cid]').on('click', function() {
 				var modalEl = $('#setParent'),
 					parentCid = $(this).attr('data-cid'),