Adding further PVS affecting beam backgrounds

The current list includes those from @natochii MDI slides.

CGHOPT:SLYTLE_1:X
CGHOPT:SLYTLE_2:X
CGHOPT:SLYTLE_1:Y
CGHOPT:SLYTLE_2:Y

But there may be more. we should discuss for a moment with @hiroyuki.nakayama .