update emerald marker swatch, misc updates to emerald and streets

[peterqliu]

fixes #1489

also rolls in some minor style updates that we had put off til post-launch, but they seem 👌 while testing them as custom styles. If need be, we can update only the sprite assets, to avoid potential breakage.

cc/ @1ec5 @incanus

[1ec5]

So far so good with Emerald. What should I look out for when testing mapbox/mapbox-gl-styles@27e8ee8?

[peterqliu]

@nickidlugash ^

[incanus]

If need be, we can update only the sprite assets, to avoid potential breakage.

We should probably play it conservative and go with that. As for approach, one idea is that we could maintain a branch in mapbox-gl-styles that we roll into the shipping GL.

[incanus]

We've got offset problems now:

[peterqliu]

@incanus those don't look like the markers in the swatch-- did we switch out?

[1ec5]

@incanus, maybe you’re running into #1488? That can happen if you use the gear menu to add annotations, then change from Mapbox Streets to Emerald, then cause a redraw by zooming or panning. It wouldn’t be a regression if that’s the case.

[1ec5]

@jfirebaugh and I are unable to reproduce the annotation artifacting in either the beta 1 branch or in the same version of the internal test app that I originally spotted this issue in. So it might be dependent on a more specific set of steps.

[nickidlugash]

What should I look out for when testing mapbox/mapbox-gl-styles@27e8ee8?

@1ec5 Sounds like you guys decided not to add this change into the release, but this change just splits up the water_label layer into two layers, filtered by area. One layer is styled the same as the original, the other just has a different min-zoom and text-size, so I imagine it shouldn't break anything.

[jfirebaugh]

Moving to #1506 instead.