* Clarify ViewportWorldToScreen being in widget space and add DeviceScalingFactor
* -Fix viewport icons being draw wrong on high DPI displays
-Fix loading viewport icons from absolute paths, which
* Address review feedback, fix build
Delete:
- I3DEngine
- Missions
- Time of day
- GameEffectsSystem Gem
- ImageProcessing Gem
- SVOGI Gem
- Various other things that don't do anything now that the legacy renderer has been removed.