Also removed distance/units from the places/show search, since you can
adjust nearness by zooming etc.
At this point the "members near here" stuff at the bottom of the page
exists mostly for accessibility and to give additional detail that we
don't currently show in the popups on the map.
So we're not using distance/units to search for members near here
anymore, but instead are just finding the 30 nearest members to the
specified location, and showing them in order of nearness.
This commit builds off of @Skud's spike on locations and largely takes
off from the `nearby_members` feature which previously existed on
members.
One thing to note is that we needed to add a search route and action to
`PlacesController` to account for requests of new places as they could
not be redirected to properly from within `PlacesController#show`.
[Story #53848631]
