Add "disable-with" to most edit forms (should fix #2264)

app/views/users/edit.html.erb

@@ -92,7 +92,7 @@
         <%= f.input :custom_style, :label => "Custom <a href='http://en.wikipedia.org/wiki/Cascading_Style_Sheets'>CSS</a> style".html_safe, :hint => "Style to apply to the whole site.", :input_html => {:size => "40x5"} %>
       </fieldset>
 
-      <%= f.button :submit, "Submit" %>
+      <%= f.button :submit, "Submit", :data => { :disable_with => "Submitting..." } %>
     <% end %>
   </div>
 </div>

app/views/users/new.html.erb

@@ -14,7 +14,7 @@
         <%= f.input :email, :required => false, :as => :email %>
         <%= f.input :password %>
         <%= f.input :password_confirmation %>
-        <%= f.button :submit, "Sign up" %>
+        <%= f.button :submit, "Sign up", :data => { :disable_with => "Signing up..." } %>
       <% end %>
     </div>
   </div>