Disable sidebar via stash

Change-Id: I90a89bba41ebf8cdc7dd5b14bf4762784fb834fa
diff --git a/templates/partial/side.html.ep b/templates/partial/side.html.ep
index a8deb0e..c64e275 100644
--- a/templates/partial/side.html.ep
+++ b/templates/partial/side.html.ep
@@ -9,7 +9,7 @@
 %   };
 % }
 
-% if (length($side_bar) == 0) {
+% if (length($side_bar) == 0 || stash('sidebar_off')) {
 %   $classes .= ' off';
 % } elsif (stash('sidebar_active')) {
 %   $classes .= ' active';