Changing permissions for federated shares

[kobergj]

PATCHing federated shares is not supported by the server. We should block editing federated shares in the webfrontend. See comment - proposal got rejected

[kobergj]

Proposal Rejected!

We need to implement patching ocm shares. We can use a frontend only approach: Delete the old share and create a new one.

[kobergj]

Current state: We'll try to implement this in the backend because it is less effort.