fixes #4123 - libvirt imaging support using backing volumes
fixes #4637 - remove search by label from all ancestry objects besides hostgroups
fixes #4605 - users should not be able to de-select disabled items in multi-select widget

fixes #4618 - added back tooltips inherited, used, and used in location / organization edit

fixes #4219 - do not disable current organization/location on multi-select
fixes #4617 - add feature to change parent of location or organization