v0.7.85

• Added line-taper= (0-1) to -style and -symbols type=curve, which narrows a line toward its tail, to a point at line-taper=1, with or without arrowheads. Tapered lines can be dashed.
• [web] Tapered lines and curves are drawn on the map. The line style panel and the symbol tool's curve section both have a Taper % control.
• [web] Fixed curve symbols with line-fade=, which were drawn without their fade.
• Added a wide-arrow marker to line-start=, line-end= and callout-end=: a solid arrowhead with a 60° point, blunter than arrow's 35°.
• [web] The line style panel, the symbol tool's curve section and the label callout End buttons offer the wide arrowhead.
• [web] Drawing sessions use much less memory.