Move users management to multi line

[skjnldsv]

• Put data to multi lines (username/displayname, email/password...)
• Put everything in read only and add toggle to edit a line
• Anything else?

@nextcloud/designers @GretaD

[jancborchardt]

We can definitely combine Display name + username, and Groups + Group admin for. Not sure it makes sense to combine email and password, especially as it’s not the password for their email. ;)

And quota, user backend and storage path can also be combined (if the latter 2 are enabled).

As for toggle to edit a line, we should have a primary "Edit" button on the right outside of the 3-dot menu, as you proposed @skjnldsv. :)

And 👍 to everthing else, much simpler and it doesn’t feel like you can accidentally edit anything.