[fixed] Ortho Mode every operation is slow

[micheus]

That was reported to me by Arg Arg.

Arg Arg Wrote:.is the big problem if i switch to Ortho Mode (example X,Y,Z Keys).
When iam in Ortho Mode every operation is slow, sluggy and jumpy on my PC.
Its like i have hundred millions of polys on my screen in a scene with only two simple cubes.
If i move to perspective mode everything works fine.
Crazy... its really not far fom unuseable when Ortho-Mode is active.

I could to confirm. It was related to the new auto-grid.

The wings_render.beam for replacement can be found here.