Added 90 degrees image rotation by cursor up/down.
Toggling source images is now done by shift+up/down.
Added ctrl+cursor left to go to last position before a random image jump.
Added key repeat to cursor left/right, just keep it pressed to walk through images.
Shift+left/right now skips 10 images.
Hotkey "0" copies current image filename to clipboard.
Delete of an image no longer jumps to first image.