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/rooms/cant_create_rooms.html.erb

@@ -0,0 +1,44 @@
+
+
+<%
+# BigBlueButton open source conferencing system - http://www.bigbluebutton.org/.
+# Copyright (c) 2018 BigBlueButton Inc. and by respective authors (see below).
+# This program is free software; you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free Software
+# Foundation; either version 3.0 of the License, or (at your option) any later
+# version.
+#
+# BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+# You should have received a copy of the GNU Lesser General Public License along
+# with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
+%>
+
+<div id="cant-create-room-wrapper" class="background h-100 cant-create-room-wrapper">
+    <div class="container h-100">
+        <div class="row h-100 align-items-center">
+            <div class="offset-3 col-6 offset-3">
+                <div class="card">
+                    <div class="card-status bg-primary"></div>
+                    <div class="card-header">
+                        <h3 class="card-title"><%= t("room.no_room.title") %></h3>
+                    </div>
+                    <div class="card-body">
+                        <%= form_for(:join_room, url: join_room_path) do |f| %>
+                            <div class="input-icon mb-2">
+                                <span class="input-icon-addon">
+                                    <i class="fas fa-link"></i>
+                                </span>
+                                <%= f.text_field :url, class: "form-control", value: "", placeholder: t("room.no_room.placeholder"), required: "" %>
+                            </div>
+                            <div class="mt-4">
+                                <%= f.submit t("room.join"), class:"btn btn-primary btn-block" %>
+                            </div>
+                        <% end %>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>