UI: Option to automatically Hide UI when game launches #804

Job	Run time
pr_build / macOS Universal (Debug)	4m 12s
pr_build / win-x64 (Debug)	8m 13s
pr_build / macOS Universal (Release)	4m 3s
pr_build / linux-x64 (Debug)	4m 32s
pr_build / linux-arm64 (Debug)	2m 38s
pr_build / osx-x64 (Debug)	4m 53s
pr_build / win-x64 (Release)	7m 24s
pr_build / linux-x64 (Release)	3m 59s
pr_build / linux-arm64 (Release)	2m 37s
pr_build / osx-x64 (Release)	3m 43s
	46m 14s

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