"Synchronize" button has no ID after generating mantain_application app in RBA

After generating the RBA module, the Synchronize button in the mantain_app doesn't work.  After debugging the code I found that the corresponding grid "user button", is created with no ID, so the onClickUserButton doesn't handle it.

(That event has a switch sentence based on the button ID)

I just set the button ID, set the same ID in the case statement and the sync now workds.