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Implement/match `LegoNavController::Notify` #5018

Job	Run time
MSVC 4.20	1m 28s
Current MSVC	2m 10s
Current msys2 mingw32	4m 13s
Current msys2 clang32	5m 21s
Download original binaries / fetch	2s
Compare with master	1m 58s
Upload artifacts	0s
	15m 12s

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