fixes #13974 - remove nested arrays passed to AR finders

Passing a nested array to Active Record finder methods is deprecated in
Rails 4.2 and will be removed, they must be flattened first.

Fixes #5707 - disassociate does not appear for physical host

Fixes #14071 - Using Sprockets directive to require host_edit_interfaces.js

Fixes #13937 - search by domain parameters searches on primary_interface

fixes #14076 - remove unused Puppetclass hostgroups counter

Fixes #13984 - inherit subnet from hostgroup even for image-based provisioning

fixes #14000 - respect custom controller permissions

Allows controller_permission method to override the permission suffix
used in resource_scope, originally from a63aa7c and removed in bb39df2.

Fixes #7494 - added search parameter to index action of usergroups

Fixes #13068 - Adds options to documentation_button and remove css float

fixes #14006 - use URL helpers in mailers

Rails 4.2 deprecates mailers from using _path helpers and from path
helpers being called with only_path => false. They should all be
changed to use _url helpers.