Refresh CalDAV accounts - fetch server-side properties
When I select in Edit > Accounts > Calendars > CalDAV a calendar, the "Refresh" button on the right is unclickable.
Please make it clickable and enable over it taking over server side properties of the calendar - colour, name, and update the ACLs (whether the calendar is still readonly, is from now on read-only).
Likewise for updating the CardDAV accounts' ACLs.
Please note, that there is another 'Refresh' operation in the calendars view, when selecting a CalDAV calendar. Consider renaming that to "Refresh content", as otherwise users will get confused.