I think having a MINUS sign to indicate that contacts may be contained in a list is confusing,
To me a MINUS - sign would give the impression they are NOT in a list.
Trying to figure out how to remove contacts from one list from another was a nightmare even after doing it a couple of times i could noit get ny head around it.
Far better use some other symbol , or perhaps use colour coding, red amber green etc to indicate wheter a lists contacts exist in another list or not.
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