[Bf-funboard] Node view tweaks request

[trip somewhere]

> The line gets fully highlighted when the nodes on both ends are
> selected. This is so you know what is selected. Maybe a different
> color from the black to have the gradient change into would be better
> instead.

That  also highlights all of the other lines, which yeah works partway
but ikes it's yet another distraction, right now I don't see the point
of a mid way highlight from the viewer node otherwise.

>I think a better solution would be to remove the need for viewer nodes by adding the possibility of selecting and viewing >output slots directly.

True and that would be neat as well. But since this is blenders way
for now, I did not want to cross the "add a feature" line at this
moment. As well as the thumbnails do help as it stands. After they are
created that is.