Revert "Handle back & forward events"

This reverts commit f80745b7db.

app/controllers/dashboard_controller.rb

@@ -7,7 +7,7 @@ class DashboardController < ApplicationController
 
     respond_to do |format|
       format.html
-      format.js
+      format.js { no_cache_headers }
     end
   end
 
@@ -18,7 +18,7 @@ class DashboardController < ApplicationController
 
     respond_to do |format|
       format.html
-      format.js
+      format.js { no_cache_headers }
     end
   end
 
@@ -32,7 +32,7 @@ class DashboardController < ApplicationController
 
     respond_to do |format|
       format.html
-      format.js
+      format.js { no_cache_headers }
       format.atom { render :layout => false }
     end
   end

app/controllers/refs_controller.rb

@@ -26,7 +26,10 @@ class RefsController < ApplicationController
   def tree
     respond_to do |format|
       format.html
-      format.js
+      format.js do
+        # disable cache to allow back button works
+        no_cache_headers
+      end
     end
   rescue
     return render_404