Bulk management of group/ subgroup subscriptions

There seems to be no obvious way to leave an entire group (including all subgroups). This leaves me with a bunch of random subgroups in my groups list. This problem has become even more apparent with the new sidebar, where its often not clear what parent group a subgroup is part of if I'm not also a member of the parent group. As subgroups are used more for intergroup networking, I can see this getting really messy, as a plethora of subgroups are spun up as they are needed, then activity tails off without ever formally ending.

Is there a page where I can scroll down a list of groups and subgroups I'm subscribed to and tick (or untick) a box to ubsub myself from any I'm no longer interested in (or they died or or or)? If not, can we have one?