The account deletion button reset credentials synchronously, which
flipped isConfigured to false and tore down the view hosting the
settings sheet mid-dismissal, leaving the sheet stuck on screen so the
button appeared unresponsive.
Now the button shows a confirmation dialog and the credential reset is
deferred until the sheet finishes dismissing. Add a UI test covering the
full delete flow and bump the build number to 5 for resubmission.
andros
2989d746fa