Better disabling of "Stop evil seasickness popup auto-center".
Review `L.FixMyStreet.SearchPanel`. Use "delegate" for event/action bindings.
Review Leaflet search results marker.
Leaflet: Clear search results when new incident marker is moved.
Leaflet: Use "delegate" for popup event/action bindings.
Leaflet: Prevent `_bindActions()` from being called multiple times.