Calendar: Show multi-day event continuation

Ellipses are now column alligned
Calendar: show ending time on the ending day of the event

The patch also changes the weekday to the ending day and
sorts the list according to to ending time on multi-day events.

This should only be accepted after the multi-day ellipsis patch
has been merged as the ellipsis in front suggests that the event
runs until "... 10:00"
Calendar: no spacing between ellipses and time.

This patch affects the whole grid's spacing but I don't see
detrimental effects.