5.1.0

Add optional pull-to-refresh for refreshing CalDAV events on some views (by azisuazusa)
Allow setting a default view to be opened from the Event List widget (by knusprjg)
Apply selected filters on all views, including widgets
Allow changing any CalDAV calendars color, even if only locally
Fix some glitches related to saving CalDAV events in a wrong calendar
Some performance improvements related to fetching events
Couple other smaller stability/ux improvements