[Suggestion] Honor the individual GIF frame times

[NeoTechni]

I'd like to make GIFs that hold on the last frame (by setting it's time to a large number) rather than have to make multiple copies of the last frame, since at current you only honor the frame time of the second frame

[NeoTechni]

But continue to dishonor the GIF internal loop counter, all GIFs should loop because if you were to honor it at this point I'd imagine it'd break a lot of GIFs