Gesture Navigation Style: rewrite
Created by: DeepSOIC
Why? https://forum.freecadweb.org/viewtopic.php?f=10&t=36192
New feature: roll gestures (for mice). Like so: LMB down, RMB down, LMB up, RMB up. Copied from Opera browser. For now, dormant - it is possible to assign commands with parameter editor, User parameter:BaseApp/Preferences/View GestureRollBackCommand (string)
. I am running out of time, so I leave making the GUI for setting them, for later.