UI improvements / image sequences

--- Add a "Reverse order" Check box to reverse the order of the images
from 0 to x
from x to 0

--- Add a possibility to re-order manually the List box by drag and drop

--- Add a possibility to set a specific Frame Duration in List box in a frame duration column.

--- Automatic Name suggestion based on the folder choosed

See(ya !

(sorry, this message was already sent, but in a 2y'old thread, so i was not sure of the visibility)