3673a03226
After double checking the sequencer code, there doesn't seem to be any reason to exclude these from the sequencer previews. This makes it possible to use the sequencer to non-destructively chain together difference Grease Pencil animated shots together without having to render each image sequence first, allowing for a smoother workflow. Just in case the initial assumption isn't entirely correct, I've put in place an extra arg to the relevant functions which can be hooked up to a suitable option on the scene strip later to turn this on/off as needed.