Add filter by operator name

[meghanhade]

No description provided.

[meghanhade]

Query params for place and name filters are not clearing when returning to index. This affects the behavior when you click on an operator name to view the feed details. (It takes two clicks to click through.)

[meghanhade]

1. don't render list until use types
2. search bar goes away after selection
3. square corners
4. smaller size

[drewda]

@meghanhade filtering by place is most important; if search by name is proving problematic, do feel free to drop or defer it.