Replace all mock data in the dev JMAP server with European-themed
content: 42 emails (was 13), 20 contacts across 2 address books
(was 3), 5 calendars and 35 events with recurrence, overlaps,
and all-day entries.
Move keyword tags in email/thread list items from the subject line
to the header row alongside the date for a cleaner layout.
Update test assertions to match the new mock data.
Linus Rath
e5c1cd45c5