Disables submit button in sign up form after submission to avoid email already exists error

app/views/registrations/new.html.erb

@@ -63,7 +63,7 @@
                   <%= invite_hidden_tag(invite) %>
                 </fieldset>
 
-                <%= f.submit t('.continue'), :class => "new-btn" %>
+                <%= f.submit t('.continue'), :class => "new-btn", :disable_with => t('.submitting') %>
             <% end %>
         </div>
     </div>

app/views/registrations/new.mobile.haml

@@ -45,7 +45,7 @@
                 = f.password_field :password_confirmation, :placeholder => "••••••••"
 
             .controls
-              = f.submit t('registrations.new.create_my_account'), :class => 'btn primary'
+              = f.submit t('registrations.new.create_my_account'), :class => 'btn primary', :disable_with => t('registrations.new.submitting')
               = link_to t('devise.sessions.new.sign_in'), new_user_session_path(), :class => 'btn primary', :style => "float: right;"
 
 %footer

config/locales/diaspora/en.yml

@@ -894,6 +894,7 @@ en:
       password: "PASSWORD"
       password_confirmation: "PASSWORD CONFIRMATION"
       continue: "Continue"
+      submitting: "Submitting..."
     create:
       success: "You've joined Diaspora!"
     edit: