Inspection settings UI: multiselection in inspections tree support
DBE-321: prevent data tooltip flicker
ScopesAndSeveritiesTable suppress unused declaration inspection
SeverityEditorDialog -- if "mixed" pseudo severity chosen then no default selection
cleanup: remove trivial comments
[git] remove obsolete javadoc
IDEA-127343 Pass ModalityState to PasswordSafe.getPassword

Since PasswordSafe.getPassword may request for the master password,
and since this request can be made from any thread, it needs the proper
ModalityState to execute invokeAndWait(), otherwise the master password
dialog won't appear above some modal progresses which requested the
password, just like in IDEA-127343.

=>
* Deprecate the existing getPassword() and create new one accepting
  ModalityState.
* Pass the ModalityState down to the MasterKeyPasswordSafe#key which
  actually shows the dialog.
* Some providers (like Nil or Memory) can safely ignore the modality
  state, since they don't show any dialogs.