Provide haptic feedback via libfeedback
Feedback levels (audio+haptic, haptic, silent) can be configured globally via g-c-c or on a per app basis ((https://source.puri.sm/Librem5/feedbackd#per-app-profiles, gnome-control-center#115 (closed)))
obsoletes !77 (closed) - so another 10 month old MR out of the way.
Closes: #166 (closed)
Edited by Guido Gunther