dolphin: Show full KFileItem statusbar text with hovered folders too

This patch changes the status bar text dolphin shows when a folder is
hovered. It now shows full folder info, eg:
"mydir (folder, symlink to /opt/mydir")
instead of:
"mydir"
This is consistent with dolphin's behavior on regular files, and
DolphinPart already does that (DolphinPart::slotRequestItemInfo has no
special cases for folders).


REVIEW: 112106