Key Map dialog improvements. #2753

Job	Run time
linux-x64-internal-release	7m 24s
macos-arm64-internal-release	7m 58s
linux-x64-internal-debug	8m 6s
macos-arm64-internal-debug	8m 18s
linux-x64-external-release	7m 47s
Check for Max SDK	1s
macos-arm64-external-release	8m 48s
macos-x64-internal-release	12m 27s
macos-x64-internal-debug	22m 9s
macos-x64-external-release	15m 10s
windows-x86-internal-release	12m 56s
windows-x86-internal-debug	15m 37s
maxplugin-${{ matrix.cfg.str }}-${{ matrix.cfg.sdk-version }}	0s
windows-x86-external-release	16m 19s
windows-x64-internal-release	17m 6s
windows-x64-internal-debug	15m 8s
windows-x64-external-release	15m 25s
	3h 10m 39s

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