Who said there aren't coding races ? haha. Fix the keyboard navigation

in the special case of moving left to the previous column and going 
upwards or downwards.

CCMAIL: peter.penz@gmx.at

svn path=/trunk/KDE/kdebase/apps/; revision=762760

src/dolphincolumnwidget.cpp

@@ -400,7 +400,9 @@ void DolphinColumnWidget::deactivate()
                    this, SLOT(triggerItem(const QModelIndex&)));
     }
 
+    const QModelIndex current = selectionModel()->currentIndex();
     selectionModel()->clear();
+    selectionModel()->setCurrentIndex(current, QItemSelectionModel::NoUpdate);
     updateBackground();
 }