templates - sync from community-templates

Fixes #9947 - restrict user taxonomies if none is set

refs #4521 - extract string, fix capitalisation

Fixes #7615 - filter ignore current context

Fixes #4787 - prevent unneeded AJAX requests on popover clicks

refs #4521 - Openstack Compute Resource: Boot from Volume on new Host

Fixes #9362 - Corrected CoreOS mediapath

Fixes #9439 - 'white spaces' changed to 'spaces' in validation error message

Fixes #9969 - remove N+1 queries on host edit page

Fixes #8812 - Pass model type so search_for is called on Host

At least on version 1.6.1, the absence of this second parameter leads to a
runtime crash when it's time to validate if the current user (non-admin) is
allowed to perform a power operation on given a host via the APIv2....