fix: update project and group membership settings

[leafty]

On project settings:

• Do not show the member controls when the user does not have sufficient permissions

On group settings:

• Use similar controls for group members as what is used for project members

/deploy renku=release-0.59.0

[RenkuBot]

You can access the deployment of this PR at https://renku-ci-ui-3374.dev.renku.ch

[leafty]

The code looks good overall! Just a couple of visual details to adjust (see inline).

One nitpick detail: when changing the access level, on the group page the Change button is disabled until you pick a different access level. On the project page, it's always enabled (see screenshot). It's just a detail, but perhaps you can update the project page too

Question about these style adjustments: should these be updated on the Project components too? The modals where adapted from the Project case.

[lorenzo-cavazzi]

Question about these style adjustments: should these be updated on the Project components too? The modals where adapted from the Project case.

It's great if you want to fix those too, to keep them all consistent, although I don't want to force you to inflate the PR with changes on other components.

[RenkuBot]

Tearing down the temporary RenkuLab deplyoment for this PR.