Enable exclusive fullscreen if using low-latency mode. #458

Job	Run time
Build windows-latest \|\| SHARED=OFF \|\| PLATFORM=GLFW	23m 6s
Build windows-latest \|\| SHARED=OFF \|\| PLATFORM=libretro	23m 8s
Build windows-latest \|\| SHARED=OFF \|\| PLATFORM=KHR_DISPLAY	22m 51s
Build windows-latest \|\| SHARED=ON \|\| PLATFORM=GLFW	22m 17s
Build windows-latest \|\| SHARED=ON \|\| PLATFORM=libretro	22m 17s
Build windows-latest \|\| SHARED=ON \|\| PLATFORM=KHR_DISPLAY	22m 31s
Build ubuntu-latest \|\| SHARED=OFF \|\| PLATFORM=GLFW	21m 25s
Build ubuntu-latest \|\| SHARED=OFF \|\| PLATFORM=libretro	22m 48s
Build ubuntu-latest \|\| SHARED=OFF \|\| PLATFORM=KHR_DISPLAY	21m 52s
Build ubuntu-latest \|\| SHARED=ON \|\| PLATFORM=GLFW	21m 31s
Build ubuntu-latest \|\| SHARED=ON \|\| PLATFORM=libretro	20m 49s
Build ubuntu-latest \|\| SHARED=ON \|\| PLATFORM=KHR_DISPLAY	21m 38s
	4h 26m 13s

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