Make Teams more useful/consistent

[kaffeeringe]

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Feature request

Which Nextcloud Version are you currently using: 30.0.4

Is your feature request related to a problem? Please describe.
A colleague was looking for a way to remove shares in the team and didn't find anything there.

Describe the solution you'd like

1. It should be possible to rename and delete the shares in the team. Moreover it would be cool to be able to add new shares here.
2. It would be consistent with Talk and contacts if it where possible to edit the team's logo.
3. (BTW: "Collective" isn't translated in the German version)