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

Gemfile

@@ -27,6 +27,7 @@ gem 'mini_racer', platforms: :ruby
 
 # Use jquery as the JavaScript library
 gem 'jquery-rails', '~> 4.3.3'
+gem 'jquery-ui-rails'
 
 # Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
 gem 'turbolinks', '~> 5'
@@ -72,8 +73,6 @@ gem 'redcarpet'
 # For health check endpoint
 gem "health_check"
 
-# For providing user roles
-gem "rolify"
 # For limiting access based on user roles
 gem 'cancancan', '~> 2.0'