[LDView] LDView 4.4 Beta 4 test release

[Philippe Hurbain]

This happens on part 88293, which is the part that was included in the original bug report that caused me to fix the problem. I suspect that it happens in other parts also. I would greatly appreciate it if people would let me know if they see any regressions in LDView's curve smoothing.

Note: because of this new behavior, I expanded the angle over which curves can be smoothed. 

Much appreciated changes. I'll keep my eyes peeled to see if this causes other problems.