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/assets/stylesheets/utilities/_primary_themes.scss

@@ -85,6 +85,11 @@ a {
   &:hover {
     color: $primary-color !important;
     background-color: $primary-color-lighten !important;
+    &.sort-disabled {
+      background: #e6e6e6 !important;
+      color: rgb(110, 118, 135) !important;
+      opacity: 0.9;
+    }
   }
   &:active {
     background-color: $primary-color-lighten !important;
@@ -102,6 +107,12 @@ input:focus, select:focus {
   &, .list-group-item.active * {
     color: $primary-color !important;
   }
+
+  &.sort-disabled {
+    background: #e6e6e6 !important;
+    color: rgb(110, 118, 135) !important;
+    opacity: 0.9 !important;
+  }
 }
 
 .text-primary {