fixup! Added testing area
Refactor
Limit sliderEnabled hack only to KIntNumInput
Widgets in test area don't need focus
Compare only parameters that have corresponding widgets
Move kcminit_touchpad to plugins.cpp
Move NonlinearInterpolator to CustomSlider
Check active config every time when KCModule is shown
Enable sliders for KIntNumInputs as soon as possible
Remove KIntNumInput hack, set tab order manually in designer
Finally fix KIntNumInputs