Make windows convertible into glass sheets

[Frank_Stein]

Right now, to remove a window that's in place you screwdriver, crowbar, and then screwdriver again. You can then push it around. If you want to recover the glass, you need to smash it and gather the shards.

I propose that the windows should be movable after the crowbar step, and the 2nd screwdrivering turns the window into a glass sheet that can be picked up and replaced or used elsewhere.