Don't show "-> end date" for 1-whole-day events

For all events that last one whole day, the widget shows an arrow beneath and the end date which is of course the same as the start date. This is redundant, because the user knows it's a one-day event if there's neither time nor end date. The end date is not shown if I activate fill up events that last more than one day. I think it sould always be that way for events that last one day.
