Colour palette doesn't detect hsl, hsla

[stevage]

trafficstars

The colour palette at the bottom of the editor appears to only detect rgb() or #abc colour definitions - not hsl(). This is obviously low impact.

[tmcw]

PRs accepted. Here's where you would start: https://github.com/mapbox/tilemill/blob/4b81fd4a12002b05253c0c98150b5af27e883d5a/plugins/editor/views/Stylesheets.bones#L308

[stevage]

Well, my last pull request has been sitting ignored since August last year: https://github.com/mapbox/tilemill/pull/2384

That does look pretty easy though.

[Komzpa]

@stevage hey, merged that one - hope merging new one will be fast too :3