This patch makes the icon being updated with the selection, so we have a more responsive open/save dialog (kfilewidget). It also uses a new way of handling the last entry of history:
1) If there is an item selected, the history combo contains the number of entry histories + 1 (the first one is the selected item).
2) If there is no item selected, the history combo only contains the history entries.
Now there is a tricky thing on my TODO. Set the icon when the result has been autocompleted.