Dialog: Unbreak standardButton() method
Without this fix, org.kde.kirigami/Dialog::standardButton() method is unusable due to footer not being an instance of T.DialogButtonBox by design. So, the method should be overwritten to use correct target.
Without this fix, org.kde.kirigami/Dialog::standardButton() method is unusable due to footer not being an instance of T.DialogButtonBox by design. So, the method should be overwritten to use correct target.