Clean up issues

[rahwang]

This had to be merged quickly for FOSS4G, but could probably be improved.

1. Do an extra round of review
2. Fix the code that toggles the neighborhood visibility (when checked and unchecked, try changing the 3D tiles styling to transparent and default)
3. The loading icon is buggy.
4. Double check the PR thread for comments that I may have missed.

[pjcozzi]

@hpinkos and @ggetz - potentially consider the above items for your upcoming talks and please close this when appropriate.