Close #555.

4chan_x.user.js

@@ -4462,6 +4462,7 @@
         return;
       }
       $.addClass(d.body, $.engine);
+      $.addClass(d.body, 'fourchan_x');
       _ref = ['boardNavDesktop', 'boardNavDesktopFoot'];
       for (_i = 0, _len = _ref.length; _i < _len; _i++) {
         nav = _ref[_i];

script.coffee

@@ -3463,6 +3463,7 @@ Main =
     unless $.id 'navtopr'
       return
     $.addClass d.body, $.engine
+    $.addClass d.body, 'fourchan_x'
     for nav in ['boardNavDesktop', 'boardNavDesktopFoot']
       if a = $ "a[href$='/#{g.BOARD}/']", $.id nav
         # Gotta make it work in temporary boards.