Merge pull request #7591 from Goober5000/fix/icon_propagation #998

Job	Run time
Mac (Debug, clang, arm64)	7m 6s
Mac (Debug, clang, x86_64)	9m 12s
Linux (Debug, clang-16, x86_64)	8m 11s
Linux (Debug, gcc-9, x86_64)	10m 25s
Linux (Release, gcc-13, -DFSO_BUILD_WITH_OPENGL=OFF -DFSO_BUILD_WITH_VULKAN=OFF)	7m 1s
Mac (Release, clang, x86_64)	11m 33s
Linux (Release, gcc-13, x86_64)	6m 12s
Linux (Debug, gcc-13, x86_64)	2m 22s
Linux (Debug, gcc-13, -DFSO_BUILD_WITH_OPENGL=OFF -DFSO_BUILD_WITH_VULKAN=OFF)	2m 29s
Linux (Release, gcc-9, x86_64)	12m 41s
Linux (Release, clang-16, x86_64)	16m 52s
Mac (Release, clang, arm64)	13m 53s
	1h 47m 57s

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