Browse page redesign

[dabreegster]

Summarizing a whole bunch of ideas from UX studies and followup meetings, here's a rough order of steps to redesign the browse page.

Part 1: schemes as layers, split ATF and LCWIP

• Remove the list of scheme cards
• Group all of the schemes controls and express as a layer
• Move the layer controls to the left sidebar (this and above started in browse_layout_v2)
• Change the scheme name filter to an autocomplete text box
• Use a search icon in the text box
• Reorg scheme filters as a big modal, and remove the slow incremental filtering
• Split into ATF and LCWIP scheme layers, UI only
• Actually split the ATF and LCWIP scheme data files in upstream repo
• The first time opening scheme or LCWIP layer, launch a popup with its caveats (and remember to do this once in local storage; put a version number there, so we can update the notes later)
• Preserve the state of filters and scheme layers in the URL

Part 2: selected layers and separate legend

• Clear layers
• Selected layers
• Make a floating right panel for the legend, for all of the active layers. Keep all controls on the left, as-is; just move the legend
• Use small radios for 2021 census (linebreak issue)
• Fix the checkbox + buttons on the right (linebreak issue)
• Reverse the order of boundary layers, and adjust thickness

Part 3: related cleanups / polish

• Reconsider "zoom to show entire scheme". Should it filter to only show it?
• Use different X button style everywhere
• Bold keys, not values, in map popups everywhere

Orthogonally to these changes, redesign the 3 map tools (for all tools actually -- SS, SB, route check):

• Basemap should be an icon bottom-right of map, use a modal to pick
• Streetview should expand into a small panel. Maybe remove Bing, or move it into an options modal
• Ruler should expand into a small panel, or maybe try tooltip text on the map instead
• Make sure the cursor for Streetview and Ruler stays changed while these tools are active

Less certain ideas:

• When opening a map popup from one layer, scroll to it in the sidebar
• Maybe consolidate some layers; boundaries could become one layer, with a radio?