function editor: fix moving alias func to the end

src/datasource-zabbix/query.controller.js

@@ -282,10 +282,8 @@ export class ZabbixQueryController extends QueryCtrl {
   }
 
   moveAliasFuncLast() {
-    var aliasFunc = _.find(this.target.functions, function(func) {
+    var aliasFunc = _.find(this.target.functions, func => {
-      return func.def.name === 'alias' ||
+      return func.def.category === 'Alias';
-        func.def.name === 'aliasByNode' ||
-        func.def.name === 'aliasByMetric';
     });
 
     if (aliasFunc) {