Touchpad KCM Pointer Speed Slider Improvement
Slider value to libinput value mapping algorithm is changed. Tested and everything is working fine.
You can test it by changing value on slider and checking the libinput value from ~/.config/kcminputrc
UI is same so I don't share screenshot.
Reviewers: ngraham, romangg, Plasma
Reviewed By: ngraham, romangg, Plasma
Differential Revision: https://phabricator.kde.org/D13767