[FEATURE REQUEST] Disable spatial mouse control temporarily in editor when using MRTK input simulator

[NoTuxNoBux]

Describe the problem

1. Place spatial mouse controller in scene.
2. Enter play mode.
3. Press the left mouse button, observe spatial mouse activating and taking over.
4. Press escape to stop using spatial mouse.
5. Press space to activate right hand simulation.
6. Press left mouse button to do pinch gesture.
7. Observe the spatial mouse taking over control again and the right hand jumping or clicking something unintended.

Describe the solution you'd like

Ideally the spatial mouse controller is automatically temporarily disabled when the MRTK input simulator activates, since having both active at the same time is rather painful during testing.

Describe alternatives you've considered

• Disable the spatial mouse controller in the scene in play mode when you want to test the right hand. This has to happen every time you enter play mode. Doing so permanently in the editor doesn't work for us since we ideally want to be able to test both constantly.
• Listen to the MRTKInputSimulator activating and toggle the spatial mouse controller ourselves, but there doesn't seem to be any event that fires from this class to do so with.