Very short meeting due to matrix problems:
Fushan
Week of efficiency:
* Move panel overlapping code from QML to C++ which accelerates
the computation 100x~200x approximately
tools.js in task manager becomes a library
* Move ToolTipArea to root item in task manager to replace MouseArea
* Process QQuickWheelEvent in the backend to get wheelEventString
* Remove duplicate thickness config entries in plasmashellrc
* Searching in Kickoff/Krunner no longer hangs plasmashell/krunner
for the first time when Marble runner is enabled
* Destroy many QQmlComponents early so no need to wait garbage
collector to delete them
* Make ImageColors generate palettes faster by positioning colors
in parallel
Nico
* Mostly cleaning up deprecated stuff
