Show empty distance options

[joshreisner]

a user can get into a weird state if they:

1. select a distance option
2. select other filters such that there are no results
3. reload the page

https://tsml-ui.code4recovery.org/tests/aasanjose.html?distance=2&type=secular&mode=me

(ideally also fix the flicker when the site loads; don't render any results if waiting for geo)