Refresh the saved search when you click on "show unapproved only"

I was going to do a fade effect for this, but it's really fast, so I don't think there's a need.

app.rb

@@ -253,10 +253,16 @@ def replace_shas_with_links(text)
     "OK"
   end
 
+  # Toggles the "unapproved_only" checkbox and renders the first page of the saved search.
+  #
+  # TODO(philc): Make this more generic to take in all options related to a saved search.
   post "/saved_searches/:id/show_unapproved_commits" do
     unapproved_only = JSON.parse(request.body.read)["unapproved_only"] || false
-    SavedSearch[:id => params[:id].to_i].update(:unapproved_only => unapproved_only)
-    "OK"
+    saved_search = SavedSearch[:id => params[:id].to_i]
+    saved_search.unapproved_only = unapproved_only
+    saved_search.save
+    erb :_saved_search, :layout => false,
+        :locals => { :saved_search => saved_search, :token => nil, :direction => "before" }
   end
 
   #handle login complete from openid provider

public/commit_search.coffee

@@ -190,13 +190,16 @@ window.CommitSearch =
   toggleUnapprovedCommits: (event) ->
     @beforeSync()
     data = { unapproved_only: $(event.target).attr("checked") == "checked" }
-    id = (Number) $(event.target).parents(".savedSearch").attr("saved-search-id")
+    savedSearchId = (Number) $(event.target).parents(".savedSearch").attr("saved-search-id")
     $.ajax
       type: "POST"
       contentTypeType: "application/json"
-      url: "/saved_searches/#{id}/show_unapproved_commits"
+      url: "/saved_searches/#{savedSearchId}/show_unapproved_commits"
       data: jQuery.toJSON(data)
-      success: => @afterSync()
+      success: (newSavedSearchHtml) => 
+        @afterSync()
+        savedSearchElement = $(".savedSearch[saved-search-id=#{savedSearchId}]")
+        savedSearchElement.replaceWith $(newSavedSearchHtml)
 
   beforeSync: ->
     # The right thing to do here is to queue up this state and re-sync when the current sync callback happens.