Removes unused alert partial

Deletes old alert partial, which has been moved to `views/shared`.
Adds filter interactive states

- Separates filter functionality into module types.
- Displays info alert when search results are outdated after changing
filters.
- Adds min-height to results-container so border between search filter
area and results goes the full height.
- Inverts the servce_area checkbox.
- Dims the checkboxes when they are not checked.
- Adds/edits tests and cassettes.