Make an upgrade that sets the default radius, and adjust language on config form.

Addresses 2 comments on Omeka-954 https://omeka3.atlassian.net/browse/OMEKA-954
respect map type on items/show
Update translation template.
Made themable the form used for contribution.
Fixed the contribution when the form is invalid.
Added a route to get all items around one.

Add pagination and center on item for proximity map.
Added an option to self-determine the confirmation of a change of a location.
Removed useless hook for contribution (managed via save).