Edge thickness

[vagkaratzas]

• Edge weight can now be shown as edge thickness, not only opacity. The Edge Actions panel replaces the "Edge Opacity By Weight" checkbox with a "Show Edge Weight As" radio — Nothing / Opacity / Width / Both — plus intra- and inter-layer width sliders for whichever property weight isn't driving. Sessions carry the choice as the independent edgeOpacityByWeight and edgeWidthByWeight booleans; files written before this default to opacity, so they render unchanged. Thickness needed Line2 (instanced quads) because WebGL renders every line primitive at exactly 1px regardless of linewidth.