Dispersing elements better

[Traumflug]

Putting this here so it doesn't get forgotten. Ben Jackson uploaded a "SmartDisperse" to gedasymbols, which he says to work better than the normal disperse. As I can't imagine a reason to disperse elements in an intentional dumb way I vote for enhancing the default behaviour with his strategy. Assuming his strategy works.

Bens announcement:

> My first test board for PCB involved an array of LEDs, and even
> with just a few components it got really annoying searching for
> the resistors that went with each LED after the
> DisperseElements().
>
> My head was filled with grandiose schemes for improving
> Disperse without turning it into autoplace. I've written
> something that does a better job than the stock function, with
> a better framework for changing the placement order if you
> come up with a better algorithm. The actual placement
> algorithm is fairly weak, but it's still a dramatic improvement
> (compare a ratsnest after the two disperses).
>
> [...]
> Run with :SmartDisperse() or :SmartDisperse(Selected)
> (you can also say All, but it's the default).

[Bert Timmerman (bert-timmerman)]

pushed to master.

[Traumflug (mah-jump-ing)]

Intenionally not marking as 'fix released', because:

- Documentation in the source code file.

- Having now two disperses() is obfuscation, they should be joined.

[Traumflug (mah-jump-ing)]

The older disperse is in ActionDisperseElements() in action.c, line 2365ff. The new disperse is in smartdisperse.c.