UI: Option to automatically Hide UI when game launches #926

Job	Run time
pr_build / macOS Universal (Debug)	4m 29s
pr_build / win-x64 (Debug)	7m 51s
pr_build / macOS Universal (Release)	4m 9s
pr_build / linux-x64 (Debug)	4m 45s
pr_build / linux-arm64 (Debug)	2m 37s
pr_build / osx-x64 (Debug)	6m 2s
pr_build / win-x64 (Release)	7m 24s
pr_build / linux-x64 (Release)	4m 1s
pr_build / linux-arm64 (Release)	2m 36s
pr_build / osx-x64 (Release)	6m 14s
	50m 8s

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