Class-based modPluginEventAssociateProcessor
Add checkSavePermission
Prevent submit with unselected plugin
autoHeight window while show errors
Class-based plugin/event/getAssoc processor
Class-based processors for event association

* origin/pr/12071:
  Class-based plugin/event/getAssoc processor
  Prevent submit with unselected plugin autoHeight window while show errors
  Add checkSavePermission
  Class-based modPluginEventAssociateProcessor