small problems on "leg_strokeWidth", "leg_fillOpacity", "strokeWidth", "strokeOpacity"

[AdrienDupas]

For the "typo" and the "choro" maps, the strokes are still present on the legend when "leg_strokeWidth" = 0

For the "mushroom" function when strokeWidth = 0, a stroke is still present and the "strokeOpacity" changes have no effect on the opacity of the stroke.

[neocarto]

Thanks for the feedback. I'll fix it when I get back.