GroupchatControl: Remove correcting state when minimizing

Minimizing a GroupChatControl should remove the self.correcting state to
avoid being in this state when restoring. Fixes #9580
3 jobs for no-message-correction-when-minimized in 2 minutes and 54 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Test
passed #11928
run-appdata

00:00:07

passed #11927
run-tests

00:02:34

 
  Build
passed #11929
run-build

00:00:12