Fixes #12216 - support http proxies for compute resources

Fixes #20469 - Register react components from plugins

Fixes #20487 - Add rebuild_config to hostgroups API

Fixes #19039 - Lock plugin roles

Fixes #20515 - always find user by login

fixes #16592 - keep consistent for headline capitalization

Based on PatternFly Outline Headline Style, Suggested to
keep consistent in headline capitaliztion.

Fixes #20396 - better handling of detection of plugin assets

1. don't warn on assets that were added by plugin configuration
2. handle '-' in plugin name

Fixes #20385 - fix the role plugin DSL

After create/update permission started to be enforced in Foreman 1.16,
the Role.where(:name => name).first_or_create can fail silently. The
newly built role is considered a new record which later when we add
permissions and save! it fails. The validation that prevents the...

fixes #18500 - replace quiet_assets with sprockets-rails flag

• fixes #18512 - support sprockets-rails 3.x

The app.assets environment is no longer always configured, and instead
is only configured when the regular Rails environment is loaded. Loading
only the 'assets' group initializers isn't sufficient....

Fixes #20034 - add Organization admin role

• Fixes #20034 - add Organization admin role
• Refs #20034 - refactor role names