App closing protection

[CTJoriginal]

LaserWeb has no app closing protection when you press X or alt f4 which allows windows PC to shut down for automatic updates and thus losing all engraving work.

I believe this could be solved by adding an "Are you sure you want to exit laserWeb?" dialogue when user is trying to close laserweb and telling windows work is not saved.

Laserweb-Workspace.json.txt

[harlock999]

Hi,
I believe this is possible to implement to some extent as I have another software that runs through a browser and at least it guards closing the tab if I'm still logged in.

This would be a new feature, probably for implementation after the merging of @easytarget version.