digiKam from trunk (KDE4) : thumbbar improvements : tooltip is now based on albumfiletips implementation instead QToolTip
We have a better control of rendering of tooltip and it become homogenous with album icon view tool tip.
Now thumbbar tool tip support color scheme themes and is suitable with all schemes.

Still TODO: factoring albumfiletip.cpp and thumbbartooltip.cpp and imagepreviewbar.cpp when it's possible