More accurate legend colours

[jtrim-ons]

In the Simple Map template (and possibly others?), the colours in the legend don't exactly match the map colours.

One way to fix this would be to add a rectangle that is the map's background colour (#f2f3f0) just behind the legend rectangles, and to make the legend rectangles' opacity the same as the map's fill opacity (0.7). The result looks like this:

Not much different!

[henryjameslau]

I think you should go ahead and fix these

[jtrim-ons]

I've made the change to the simplemap template. I'll work on the others when I find time.