bug#8615: Please make sure v q removes the buffer for JPGs just like it does for other files

[Juri Linkov]

> JL> Perhaps you visit only small images that fit into the screen,
> JL> so you don't need to use image-mode keys other than `q'.
> JL> But when images are larger and you need to scroll them, you are screwed.
> Hmmm, well the only difference I see is C-h m doesn't give a key list

You can see the difference with `C-h b'.  Then you will see:

  RET           image-toggle-animation
  SPC           image-scroll-up
  DEL           image-scroll-down

vs.

  RET           View-scroll-line-forward
  SPC           View-scroll-page-forward
  DEL           View-scroll-page-backward

> ... Also no key to reduce the size so an image fits in the buffer.

`image-scale-fit-height' is intended to be bound to `c f h' in
`image-transform-mode', but for some reason it's commented out.