Обсуждение: [RM4341] Master Password Screen should give a proper error message ifuser provide empty password

This seems to already have been processed, but I'm writing for archiving/process-compliance

Submitting patch for RM 4341.

This patch 1) adds detection of button-click, so that error message can be displayed upon input of empty password, and 2) refactors code so that an empty password when password exists will display "Incorrect Password" instead of just refreshing the modal

Cheers,

--Richard