GFX: Prevent MM screen being written to the client #349

Job	Run time
cppcheck	17m 53s
code formatting check	20s
min features with gcc	2m 42s
min features with g++	2m 10s
min features with clang	2m 18s
max features with gcc	4m 14s
max features with g++	1m 49s
max features with clang	4m 30s
max features with gcc and DEBUG	2m 31s
max features with gcc for 32-bit arch (legacy OS)	1m 49s
max features with g++ for 32-bit arch (legacy OS)	1m 26s
max features with clang for 32-bit arch (legacy OS)	2m 9s
	43m 51s

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