Comment 13 for bug 976650

I'll push a branch tomorrow with an other waveform based on pure OpenGL lines.
Really small details are quite easy to see and it look much more like 1.10. You will tell me if it suits you.
I'll try to make a simpler version in the actual "simple" version cause perf with pure OpenGl calls is way better.
It should solve a bit the performances issue too ...