Through the ui the user can now right click on a place group
and request to hide it.
Note: It is not the collapsing solution, which would need a way bigger
effort on the model to be achieve but an intermediary solution that could
be useful for users.
Depends on D8367
Depends on D8948
Depends on D8947
Depends on D8946
Depends on D8945
Depends on D8944
Depends on D8943
BUG: 300247