Touch gestures could only produce a left drag and a right click, so a
guest that needs the middle button (paste or pan in many Linux and CAD
programs) or a right button drag could not be used without a mouse.
Add "Middle Click" to the long press and two finger tap actions, and
"Right Click & Hold" and "Middle Click & Hold" to the two and three
finger pan actions. These are new values for existing settings and the
defaults are unchanged.
Reworked from #7697.
Assisted-by: Claude:claude-fable-5-1
osy
cdfc7129e4