- Render details of results on popup
   - Currently reuses ResultView while we determine what is appropriate
     for the popup content
- Add "Details" button to popup to display details in sidebar
    - To accomplish, some refactoring:
      * Move triggering of details view out from the views
    and onto the model. Now each result has a `show_detail` boolean
    that the ResultsCollection manages. The catalog listens for changes
    on the collection to set a `detail_result` attribute, which in turn
    is listened to by the sidebar view.
      * This way the parent-view orphaned
    popover can trigger the detail in addition to the main result list view
- Apply custom leaflet popup styling

* Highlight geom for result with an open popup
* Highlight geom for result with open detail panel
* Close popup on detail open