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/views/admins/components/_users.html.erb

@@ -28,7 +28,7 @@
 # with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
 %>
 
-<% if @role.present? %>
+<% unless @role.nil? %>
   <%= render "shared/components/admins_tags" %>
 <% end %>
 
@@ -88,7 +88,7 @@
                     <td><%= user.provider %></td>
                     <td class="text-center">
                       <% roles = user.roles().pluck(:name) %>
-                      <%= render "shared/components/admins_role", roles: roles %>
+                      <%= render "shared/components/admins_role", role: user.highest_priority_role %>
                     </td>
                     <td>
                       <% if roles.include?("pending") %>
@@ -122,16 +122,6 @@
                               <button class= "delete-user dropdown-item" data-toggle="modal" data-target="#deleteAccountModal">
                                 <i class="dropdown-icon fas fa-user-minus"></i> <%= t("administrator.users.settings.delete") %>
                               </button>
-
-                              <% if roles.include?("admin") %>
-                                <%= button_to admin_demote_path(user_uid: user.uid), class: "dropdown-item" do %>
-                                  <i class="dropdown-icon fas fa-level-down-alt"></i> <%= t("administrator.users.settings.demote") %>
-                                <% end %>
-                              <% elsif roles.include?("user") %>
-                                <%= button_to admin_promote_path(user_uid: user.uid), class: "dropdown-item" do %>
-                                  <i class="dropdown-icon fas fa-level-up-alt"></i> <%= t("administrator.users.settings.promote") %>
-                                <% end %>
-                              <% end %>
                               <%= button_to admin_ban_path(user_uid: user.uid), class: "dropdown-item" do %>
                                 <i class="dropdown-icon fas fa-lock"></i> <%= t("administrator.users.settings.ban") %>
                               <% end %>