Preference or Password Generator / Checker windows don't block main window actions

[mikelolasagasti]

Overview

When Preferences window is active, parent window actions are available

Steps to Reproduce

1. Open Preferences / Password Generator / Password Checker
2. Do any action on main window like add entry or remove entry

Actual Behavior

[gbm19]

It seems to me that current behavior is on purpose.
In case you would like the Utility dialogs to be modal, you can use the attached patch.

make-utility-dialogs-modal-patch.txt