GRN2-176: Create a role editor that allows admins to specify what permissions each role has (#709)

* Add roles editor

* Add colour selection ability to roles

* Add ability to assign roles to users in the UI

* Remove rolify and replace it with our own custom roles implemenation

* - Fix all existing roles functionality
- Fix super admins

* Fix bugs with new customers not have default roles

* Add can't create room setting

* Code improvements

* Fix migration

* Add tests for new methods

* Translate reserved role names

* Pull roles from saml/ldap

* Fix rspec

* Fix scrutinizer issues

* Fix email promoted/demoted tests

* Apply comments

* Redirect directly to the main room

* Add comments

app/helpers/theming_helper.rb

@@ -31,7 +31,7 @@ module ThemingHelper
 
   # Returns the user's provider in the settings context
   def user_settings_provider
-    if Rails.configuration.loadbalanced_configuration && current_user && !current_user&.has_cached_role?(:super_admin)
+    if Rails.configuration.loadbalanced_configuration && current_user && !current_user&.has_role?(:super_admin)
       current_user.provider
     elsif Rails.configuration.loadbalanced_configuration
       @user_domain