Added tests for numpad key translation #758

Job	Run time
android-sfml-graphics	2m 44s
ios-sfml-graphics	43s
android-sdl	6m 32s
ios-sdl	3m 0s
linux	5m 21s
linux-latest-dev	4m 56s
linux-oldest	2m 55s
linux-per-backend	5m 35s
macos	1m 55s
windows	2m 46s
windows-clang	5m 29s
windows-oldest	6m 39s
windows-static-mt	5m 52s
nightly-build-windows-visual-studio	8m 1s
	1h 2m 28s

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