Fix crash when trying to add a dive or plan when a filter is active.

The planner used the selected dive on the dive list, and
when there's a filtering in action it can be in a state where
there's no dive selected.

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

qt-ui/divelistview.cpp

@@ -825,3 +825,9 @@ void DiveListView::updateLastImageTimeOffset(const int offset)
 	s.beginGroup("MainWindow");
 	s.setValue("LastImageTimeOffset", offset);
 }
+
+void DiveListView::endSearch()
+{
+	searchBox.clear();
+	searchBox.hide();
+}