Add three indexes to formEditor.sql.

Play the following to existing tables:
ALTER TABLE `FormElement` ADD INDEX `feIdContainer` (`feIdContainer`);
ALTER TABLE `FormElement` ADD INDEX `ord` (`ord`);
ALTER TABLE `FormElement` ADD INDEX `feGroup` (`feGroup`);

extension/qfq/sql/formEditor.sql

@@ -105,7 +105,11 @@ CREATE TABLE IF NOT EXISTS `FormElement` (
 
   PRIMARY KEY (`id`),
   KEY `formId` (`formId`),
-  KEY `formId_class_enabled_deleted` (`formId`, `class`, `enabled`, `deleted`)
+  KEY `formId_class_enabled_deleted` (`formId`, `class`, `enabled`, `deleted`),
+  KEY `feIdContainer` (`feIdContainer`),
+  KEY `ord` (`ord`),
+  KEY `feGroup` (`feGroup`)
+
 )
   ENGINE = InnoDB
   DEFAULT CHARSET = utf8