Fixes #5673 - Allow deletion of role with users

fixes #16725 - add plugin extension point for smart proxies

Fixes #16803 - tolerate templates without documentation

fixes #16786 - don't call to_sentence on associations

refs #16702 - fix deprecation passing 'controller' etc.

Fixes #14277 - Added description field to users

Fixes #10930 - Make widget names and titles consistent

Fixes #16114 - Expose host parameters to GET /api/hosts

Fixes #16723 - Lazy load data for dashboard widgets

Fixes #12111 - Set width for host list action column

This makes no siginificant change to core but allows unbreaking
foreman_column_view plugin.