[BUG] Show close confirmation if setting is active

[XanatosX]

Is your feature request related to a problem? Please describe.

If you enable the "Confirm close" setting it still does not show a box on application close. This features got lost while implementing the mvvm framework.

Describe the solution you'd like

Properly show the window as expected

Describe alternatives you've considered

-

Additional context

-

[XanatosX]

At the moment of speaking I do not know how I could achive this.

I cannot await a dialog box in a weakreferencemessage call. And I cannot really open a dialog in the closing event prevent it if required.

I need to find a solution for this. I will hide the option for now from the settings menu.