CI: Improved test coverage of mouse #250

Job	Run time
build (stable, ubuntu-latest, libei,wayland,xdo,x11rb)	5m 41s
build (stable, ubuntu-latest, default)	2m 40s
build (stable, ubuntu-latest, libei)	4m 26s
build (stable, ubuntu-latest, wayland)	2m 53s
build (stable, ubuntu-latest, xdo)	2m 21s
build (stable, ubuntu-latest, x11rb)	3m 11s
build (stable, windows-latest, default)	2m 42s
build (stable, macos-latest, default)	1m 10s
build (nightly, ubuntu-latest, libei,wayland,xdo,x11rb)	5m 24s
build (nightly, ubuntu-latest, default)	2m 22s
build (nightly, ubuntu-latest, libei)	4m 5s
build (nightly, ubuntu-latest, wayland)	3m 9s
build (nightly, ubuntu-latest, xdo)	2m 37s
build (nightly, ubuntu-latest, x11rb)	2m 59s
build (nightly, windows-latest, default)	2m 30s
build (nightly, macos-latest, default)	1m 22s
build (1.82.0, ubuntu-latest, libei,wayland,xdo,x11rb)	5m 44s
build (1.82.0, ubuntu-latest, default)	2m 55s
build (1.82.0, ubuntu-latest, libei)	4m 33s
build (1.82.0, ubuntu-latest, wayland)	3m 44s
build (1.82.0, ubuntu-latest, xdo)	3m 7s
build (1.82.0, ubuntu-latest, x11rb)	2m 58s
build (1.82.0, windows-latest, default)	2m 35s
build (1.82.0, macos-latest, default)	1m 48s
	1h 16m 56s

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