Implement a default quota per group.

We need a way for admins to set default quotas for team folder creation, based on group membership. This needs a group -> quota mapping in the Teams admin settings.

Admin settings --> Teams

• In the Team settings, admins can add entries to a table, defining default quotas for groups.
• When a user creates a new team, the highest quota of the groups, this user is a member of, gets applied to the new Team folder.
• At least a line for "all" is always present in the table, which is applied at team creation, when the user isn't a member of any other quota group.
• The three-dot menu lets admins delete any mapping, despite "all".
• The quotas only get applied at team creation. An admin can alway change the quota of existing teams later on.

Examples

• Bob is a member in the groups marketing and engineering. He creates a new team, which gets a quota of 5 GB.
• Alice is not a member of any groups defined in this list. Her newly created team gets a quota of 100 MB.