Osm-jet

* Fix rendering of model name on delete button (use `verbose_name` rather than `model_name`)
* Bring in Jet's JS locally to more cleanly make changes/fixes
* Fix issue with CompactInline where saveing with errors made an extra empty item
* Fix inline add another button on SortedM2M and DjangoM2Ms not opening in the popup iframe
* Update CSS for Checkbox fields to bring them inline stylewise with other fields
* Fix errors on login form rendering multiple times
* Adjust object-tool CSS the make it always one line of buttons

* Packaging fixes

* Fix sidebar not working for mobiles
* Hide fields named 'order' on compact inlines
* Added a 'Copy link' button to the sharing links
* Various responsive fixes

* Fix issue with sortedM2M not getting initialised outside of CompactInlines

* Fix for `admin/change_form.html`

* Initial release