ec65f84869
This is just changing the ui. There is no change in functionality yet. Traditionally if you could not submit the change, the submit button was just not there (visible=false). This behavior is still there if atomic topics are enabled and the submission is prevented by the current change. That doesn't break with the history. If however another change in the same topic blocks submission the submit button is shown, but disabled. It would be a nice follow up change to give the reason to the user what exactly blocks submission, but that blocker may not be accessible for the current user. Designing a precise and helpful error message, which doesn't leak any secrets is done in a follow up commit. Change-Id: Ib32a4511a0308da32a8c5d1c7b1a6f124a03576e