Add new user settings pages for Chat and Wallet

app/views/settings/_xmpp.html.erb

@@ -0,0 +1,18 @@
+<%= form_for @user, url: setting_path(:xmpp), html: { :method => :put } do |f| %>
+<section>
+  <h3>Contacts</h3>
+  <ul role="list">
+    <%= render FormElements::FieldsetToggleComponent.new(
+      field_name: "user[preferences][xmpp][exchange_contacts_with_invitees]",
+      enabled: @user.pref_enabled?("xmpp:exchange_contacts_with_invitees"),
+      title: "Exchange contacts when invited user signs up",
+      description: "Add each others contacts, so you can chat with them immediately"
+    ) %>
+  </ul>
+</section>
+<section>
+  <p class="pt-6 border-t border-gray-200 text-right">
+    <%= f.submit 'Save', class: "btn-md btn-blue w-full md:w-auto" %>
+  </p>
+</section>
+<% end %>