Improving the KeyScroller - step 5 (see below)

- Implementing the Immediate ActionTime
- Removing the State ScrollingStrategy
Improving the KeyScroller - step 6 (see below)

- Renaming StayOnTheSameForever to StayOnTheSameLocked
- MouseRadar refactoring : methods were scattered between MouseRadar.cs & Radar.cs, there is now a MouseRadarPlugin.cs that does what a plugin does (registering to services, to the configuration etc..) and a Radar.cs that handles the actual radar logic.
- The MouseRadar is driven by the scrolling tick : it now moves veeeery slowly. The next step is to implement a continuous movement with the discrete tick given by the scroller.
Improving the KeyScroller - step 7 (see below)

- Integrating the Radar continuous behavior
- Reducing the Priority of the radar's timers
Improving the KeyScroller - step 8 (see below)

- Radar : Calibrating the rotation weight to give a valid user experience based on the speed chosen for the scrolling & the radar
- Turbo scrolling doesn't "turbo" on the root elements anymore
A root element that has no siblings is directly entered