User management design update

[jancborchardt]

How to use GitHub

• Please use the 👍 reaction to show that you are interested into the same feature.
• Please don't comment if you have no relevant information to add. It's just extra noise for everyone subscribed to this issue.
• Subscribe to receive notifications on status change and new comments.

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Describe the solution you'd like
These suggestions came out of the account management design review call on 2025-06-17 with @Clementine46 @kra-mo @emberfiend @susnux @juliusknorr @Antreesy

• Change editing flow to modal, same like for account creation – can use the same modal as "New account", just "Edit account"
• Password column takes a lot of space but always appears empty → Could be removed if we use a modal for editing
• Then the groups list column could be a bit wider to be able to show more groups
• How to bulk add people to groups → Issue exists and @Antreesy will post his mockup at Improve group management #5704
• Search function already implemented for groups, but we should also have it in general, for people
  • Bug: "Guests" group shows always in the list of results