Fix session list processing #1054

Job	Run time
cppcheck	19m 11s
code formatting check	42s
min features with gcc	2m 21s
min features with g++	2m 9s
min features with clang	2m 7s
max features with gcc	2m 53s
max features with g++	2m 16s
max features with clang	3m 58s
max features with clang and AddressSanitized	2m 45s
max features with gcc and DEBUG	2m 32s
max features with gcc for 32-bit arch (legacy OS)	2m 4s
max features with g++ for 32-bit arch (legacy OS)	1m 50s
max features with clang for 32-bit arch (legacy OS)	2m 1s
	46m 49s

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