GNOME screenshot does not save files

The PrintScreen hotkey is set up to save screenshots in /.

As there is no right to write in this folder, those screenshots are not saved, and user get no error message.

Feature Branch: matsa:bugfix/8087-gnome-screenshot-save-to-home-folder

Original created by @matsa on 8087 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information