Fixes #18317 - Clone user role via API

Fixes #14492 - Unify delete and minimize for dashboard widgets

Originally the idea was for the buttons to have a different effect on
the widgets, however with changes introduced later on these differences
have been reduced to being insignificant.

Fixes #18345 - Improve templates error handling

fixes #18662 - stop default scope being overridden by association

Ensure the Taxonomix empty default scope isn't overridden by association
scopes which (effectively) calls `.where(:id => ...)` and overrides the
value of :id set in this default scope. This occurs on Rails 5.0 which...

fixes #18676 - don't ignore notification expiry

This also adds the ability to mass refresh expiry dates.

refs #16982 - check _ids getters as admin user in taxonomy tests

After a request and User.current is back to nil, the ids getters will
not return any results as the default taxonomix scopes don't permit it.
The clone test was instead testing that _no records were associated.

fixes #18665 - call #to_h before comparing AC::Parameters to hash

Allows comparisons when ActionController::Parameters is separated from
Hash in Rails 5.0. #permit! is now called on inner hashes sent through
KeepParam (similar to rails/rails@e86524c in 5.1) so they are included...

refs #16982 - pass ID, not models into model.find

Fixes #17228 - Select templates as global defaults (#4283)

This should allow user to select templates that will be used
for building PXE Default on TFTP proxy. These templates will
not be updated from seeds during updates.

Fixes #16982 - Scope properly when no taxonomies are set

The default scope for hosts and other objects did not restrict
properly by taxonomies. An user without organizations or
locations, could do anything it's permissions allow to.
The list of hosts was unrestricted and showed hosts in...