Bbox

Fixes bounding box issues for problematic countries.
Needs running migrations.
If the tests require having a local version of leaflet, then you'll need to switch over the app to use the same: removing the CDN here: https://github.com/unepwcmc/ProtectedPlanet/blob/bbox/app/views/layouts/application.html.erb#L8 and adding it to the app manifest.