Add key shortcut to add to favgroup

app/views/favorite_groups/_add_to_favgroup_dialog.html.erb

@@ -0,0 +1,11 @@
+<p>Select a favorite group to add this post to:</p>
+
+<% CurrentUser.favorite_groups.each_with_index do |favgroup, i| %>
+  <div>
+    <%= i + 1 %>.
+    <%= link_to favgroup.name,
+      add_post_favorite_group_path(favgroup, :post_id => post.id, :format => :js),
+      :id => "add-to-favgroup-#{i + 1}", :class => "add-to-favgroup",
+      :method => :put, :remote => true %>
+  </div>
+<% end %>

app/views/favorite_groups/add_post.js.erb

@@ -0,0 +1 @@
+Danbooru.notice("Added post to favorite group <%= escape_javascript(@favorite_group.pretty_name) %>");

app/views/posts/show.html.erb

@@ -133,6 +133,10 @@
   <div id="add-commentary-dialog" title="Add artist commentary" style="display: none;">
     <%= render "artist_commentaries/form", :artist_commentary => @post.artist_commentary %>
   </div>
+
+  <div id="add-to-favgroup-dialog" title="Add to favorite group" style="display: none;">
+    <%= render "favorite_groups/add_to_favgroup_dialog", :post => @post %>
+  </div>
 </div>
 
 <% content_for(:page_title) do %>

app/views/static/keyboard_shortcuts.html.erb

@@ -28,6 +28,7 @@
         <li><kbd class="key">a</kbd> Previous post</li>
         <li><kbd class="key">d</kbd> Next post</li>
         <li><kbd class="key">f</kbd> Favorite post</li>
+        <li><kbd class="key">g</kbd> Add post to favorite group</li>
         <li><kbd class="key">r</kbd> Go to random post</li>
         <li><kbd class="key">v</kbd> Toggle between sample and full size</li>
       </ul>