fixes #3698 - add image_id alias to server resource as form uses it

fixes #3661 - mis-redirection from /hosts/fqdn/edit to /hosts

fixes #3493 - check if auto user reg is allowed for auth source

Fixes #3468 - Move token expiry to scope to avoid FK issues

fixes #3645 - fix total value in summary mail subject

fixes #3603 - replaced a relation with a collection in 'where' conditions

fixes #3107 - enable sorting of hostgroups by label, sort by default

fixes #3516 - resource names (inc. domains) are now being parametrized when used to construct urls

fixes #3622 - smart proxy features are now being loaded dynamically

fixes #3017 - split APIv2 controllers from v1 parents