- Move call to SwitchGameWindowToUseGameViewport to happen right after EngineInit instead of after first tick of GameEngine. Fixes cases where we are capturing video and trying to get viewport settings earlier in the process.
- Clean up moved to only happen on the first GameEngine tick isntead of checking for the PreLoadScreenManager every tick
#tests windows editor, windows editor client, ios client
#rb none
#ROBOMERGE-OWNER: ryan.vance
#ROBOMERGE-AUTHOR: thomas.ross
#ROBOMERGE-SOURCE: CL 4976275 via CL 4977561 via CL 4978220
#ROBOMERGE-BOT: DEVVR (Main -> Dev-VR)
[CL 5033214 by thomas ross in Dev-VR branch]