Allow selection of time events which are not completely in view
Allow selection of time events which are not completely in view

Noticed the problem that when moving events which were slightly out of
view (e.g. long duration events or at high zoom levels), the
interactive view wasn’t showing. Using intersection of the two
rectangles rather than requiring full containment covers these cases as
well.

patrickHelmedica/Calendar,Sol88/Calendar,jumartin/Calendar