Remove photos from timeline when gallery is removed
''''I think, it'll be the best, when it will work with a synchronisation out
of LR, e.g., when I delete the gallery in LR, it'll be delete in irista.
That'll be the most comfortable funktion.
If this would be a problem, the next step may be, that I could delete
the gallery in irista, so, that all pictures, which are in that gallery,
whould be deleted with one button-press.
Now I have the following problem: When I did an upload with an
LR-Gallery, I have to sort this pictures in irista step by step. ;-(''''