Minor update for Mouse/Keyboard header #355

Job	Run time
build (x86-Debug-UWP, amd64_x86)	1m 12s
build (x64-Release-UWP, amd64)	1m 17s
build (x64-Debug-UWP-Clang, amd64)	2m 0s
build (arm64-Debug-UWP, amd64_arm64)	1m 12s
build (x64-Debug-UWP, amd64)	1m 3s
build (arm64-Release-UWP-Clang, amd64_arm64)	2m 8s
build (x64-Release-UWP-Clang, amd64)	4m 27s
build (x86-Debug-UWP-Clang, amd64_x86)	2m 29s
build (arm64-Release-UWP, amd64_arm64)	1m 55s
build (arm64-Debug-UWP-Clang, amd64_arm64)	1m 59s
build (x86-Release-UWP-Clang, amd64_x86)	2m 4s
build (x86-Release-UWP, amd64_x86)	1m 23s
	23m 9s

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