Revisit location drawer

[ezwelty]

The location drawer is one of the most complex and fragile parts of the code and may be worth redesigning with a goal of simplifying the layout and underlying logic. For example:

• Move photos to within the drawer (below location types)
• Use a common fullscreen layout for map and list view that allows scrolling (e.g. https://jsfiddle.net/ofg89bna/1/)
• Only display location types when drawer is in middle position (avoiding an extra API call), then clicking an expand button for a full view