hsMessageBox Cleanups #2359

Job	Run time
macos-x64-internal-release	26m 5s
macos-x64-internal-debug	19m 11s
macos-x64-external-release	22m 7s
linux-x64-internal-release	8m 59s
linux-x64-internal-debug	9m 2s
linux-x64-external-release	9m 55s
Check for Max SDK	1s
windows-x86-internal-release	21m 23s
windows-x86-internal-debug	14m 32s
windows-x86-external-release	21m 48s
windows-x64-internal-release	22m 22s
windows-x64-internal-debug	13m 37s
windows-x64-external-release	16m 16s
maxplugin-${{ matrix.cfg.str }}-${{ matrix.cfg.sdk-version }}	0s
	3h 25m 18s

Provide feedback