Toggle a BVAP layer

[mapmeld]

Draft/demo of BVAP toggle on Colorado maps, trying to show a proof-of-concept so we can figure out a good UI

Feedback

• can we update the population layer upload process so that populations are uploaded as integers and not strings? I don't know how it affects storage or overhead, and it is manageable in the map styling code, just wanted to mention it
• I think that this data might be showing % Black, and not the % BVAP

Questions:

• should the layer be in Evaluation, in its own sidebar accordion section, or added to the map toolbar?
• should the map key be over the map or in the same section as the toolbar?
• currently hardcoding which maps have population data. Should this / is this on the DB record?