Add extended about page stub

app/views/about/more.html.haml

@@ -0,0 +1,8 @@
+- content_for :page_title do
+  #{Rails.configuration.x.local_domain}
+
+.wrapper
+  = @extended_description.html_safe
+
+  - if @contact_account
+    = render partial: 'authorize_follow/card', locals: { account: @contact_account }

app/views/admin/settings/index.html.haml

@@ -9,6 +9,12 @@
       %th Setting
       %th Click to edit
   %tbody
+    %tr
+      %td{ rowspan: 2 }
+        %strong Contact information
+      %td= best_in_place @settings['site_contact_username'], :value, url: admin_setting_path(@settings['site_contact_username']), place_holder: 'Enter a username'
+    %tr
+      %td= best_in_place @settings['site_contact_email'], :value, url: admin_setting_path(@settings['site_contact_email']), place_holder: 'Enter a public e-mail address'
     %tr
       %td
         %strong Site description
@@ -21,8 +27,10 @@
         %code= '<em>'
       %td= best_in_place @settings['site_description'], :value, as: :textarea, url: admin_setting_path(@settings['site_description'])
     %tr
-      %td{ rowspan: 2 }
-        %strong Contact information
-      %td= best_in_place @settings['site_contact_username'], :value, url: admin_setting_path(@settings['site_contact_username']), place_holder: 'Enter a username'
-    %tr
-      %td= best_in_place @settings['site_contact_email'], :value, url: admin_setting_path(@settings['site_contact_email']), place_holder: 'Enter a public e-mail address'
+      %td
+        %strong Extended site description
+        %br/
+        Displayed on extended information page
+        %br/
+        You can use HTML tags
+      %td= best_in_place @settings['site_extended_description'], :value, as: :textarea, url: admin_setting_path(@settings['site_extended_description'])