- Make the same sub-thumbnails always have the same rotation, no matter in the how many'th iteration they are shown
- Align the iteration frame so that the first one always has the same layout. This makes them exactly repetitive, instead of creating random new frames due to misalignment.
- Fix some problems with the iteration: Always only count "valid" frames as skipped, making the order correct
- Make directory previews also work for DVD directories, by propagating the images from the VIDEO_TS subdirectory.

svn path=/trunk/KDE/kdebase/runtime/; revision=967783