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.lock

@@ -149,6 +149,8 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
+    jquery-ui-rails (6.0.1)
+      railties (>= 3.2.16)
     json (2.2.0)
     jwt (2.2.1)
     libv8 (7.3.492.27.1)
@@ -257,7 +259,6 @@ GEM
       syslog_protocol
     request_store (1.4.1)
       rack (>= 1.4)
-    rolify (5.2.0)
     rspec-core (3.8.2)
       rspec-support (~> 3.8.0)
     rspec-expectations (3.8.4)
@@ -363,6 +364,7 @@ DEPENDENCIES
   i18n-language-mapping (~> 0.1.0)
   jbuilder (~> 2.5)
   jquery-rails (~> 4.3.3)
+  jquery-ui-rails
   listen (~> 3.0.5)
   lograge
   mini_racer
@@ -381,7 +383,6 @@ DEPENDENCIES
   recaptcha
   redcarpet
   remote_syslog_logger
-  rolify
   rspec-rails (~> 3.7)
   rubocop
   sassc-rails