Fix distribution settings

  • Lorentz, Gaussian, Log Normal: rename Sigma factor --> Rel. sampling width

- [ ] Cosine, Trapezoid: samples at ends have 0 weight. Should we use another sampling algorithm here?

  • If nullify Sigma factor then sampling corresponds to Sigma factor = 2: image
  • Trapezoid: check: LeftWidth, MiddleWidth, RightWidth have wrong checks. Any widths >0 should be allowed.
Edited by Mikhail Svechnikov