add global touchscreen gestures
Swipe with three fingers
- left to switch to the previous virtual desktop
- right to switch to the next virtual desktop
- up to trigger present windows
Right now they're still hard coded (and not 1:1, but the desktop grid effect has 0 touch support) but I think that's material for future MRs. What I still want to do is 3 fingers down for triggering a screenshot (like on Android) but I'm not 100% sure how to go about that. Simply hard code a dbus call to spectacle?