Explicitly mention account name in the sources labels/tooltips in Quick Add popover, ics Import dialog, and "Manage Calendars" dialog
Nextcloud creates a calendar named "Personal" by default for each account. Users with several nextcloud accounts have good chances to have several calendars with the same "Personal" name.
As of gnome-calendar 45, the quick add popover displays the calendar name without referring the target account. This ambiguity in the calendar name make users have to click on the calendar menu to check if the selected calendar is indeed the intended one.
Without consideration for the current refactoring of this popover, I think a simple solution would be to display the account name in pale grey near the calendar name. Tooltips would be OK but probably not super useful on mobile devices.
Edited by Éloi Rivard