In the import dialog, start and end date-time fields were being
incorrectly displayed, not considering the local timezone and the
24-hours vs 12-hours format used by the user. Also, the libical
already deals with the case in which events do not have the DTEND
field, simplifying the implementation.
Fixes#1175
In case the location is an URL, it is irrelevant to display the full
link,
as it is not clickable. So, this shows the meeting service provider if
it
is known or reduces the text in the tooltip, preventing it from covering
other information in the calendar.
Closes: #1232