mouse highlighting on images

[David Kastrup]

Hello,

a few months ago we had a change in cursor display on images that
would cause just the border of the image to blink instead of the
whole image.

A similar issue is around images with the mouse-highlight property
set: if the images are mostly of uniform color, the whole image lights
up in green.  I think it would be reasonably to do the same thing
here as with the cursor blinking.


-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum