Camera Controls Seem Sluggish Sometimes

[iontom]

After zooming a certain amount, or using directional keys... Sometimes motion slows to a crawl. We may need some type of variable speed flight type controls.

Controls similar to this would be good.
http://mrdoob.github.io/three.js/examples/webgl_lensflares.html

Or best case, mapping the forward motion from this to the up/down keys within the current controls.

[BrianErikson]

I think this issue has something to do with moving at a speed that scales with your zoom percentage. I've noticed if I zoom in too far I can barely move anywhere, but can fly around if I zoom out with the scroll wheel a bit.