Build the calendar settings view model in a single pass: every calendar as a dropdown row (with the active one flagged), and the non-builtin calendars as the deletable imported list.
The registry entries as [id, registration] pairs.
[id, registration]
The id of the active calendar.
Resolves a label localization key to its display string.
The dropdown rows and the imported-calendar rows.
Build the calendar settings view model in a single pass: every calendar as a dropdown row (with the active one flagged), and the non-builtin calendars as the deletable imported list.