Is your feature request related to a problem? Please describe

I would like to define gestures specifically for areas of my screen that do not have a window. This is different from a global gesture, because I do not want the same gesture to apply to any windows.

Describe the solution you'd like

Perhaps a special "None" value could be added, similar to this ALL value. The down side is that some applications might actually have that name, but the logic already exists and this seems like the simplest approach.

Describe alternatives you've considered

I tried leaving the application value empty in my config file. This did not seem to work, but that syntax could probably be made to work. I think it would be more clear to have explicit syntax though.

Additional context

I might try to add this feature myself if I have time. If there's already a way of achieving the result, please let me know. 🙂