fixes #5680 - quote searches for config groups containing spaces
fixes #5553: FiltersHelper#search_path returns an empty string for unrecognized resources
Fixes #5637 - Don't raise lease conflicts when reading ad-hoc DHCP leases
fixes #5660 - use with_taxonomy_scope for OS media selection
fixes #3492 - API v2 nested routes for each controller
fixes #5780 - API v2 - RESTful way to add/remove many-to-many association one at a time rather than passing all id's