Fix hiding of page content behind menu

We use jQuery to to the initializaton rather than directly overwriting
onload, which breaks other things,

Fixes #11820, #11812

Signed-off-by: Michal Čihař <michal@cihar.com>

ChangeLog

@@ -17,6 +17,7 @@ phpMyAdmin - ChangeLog
 - issue #11810 'Add to central columns' (per column button) does nothing
 - issue #11727 SQL duplicate entry error trying to INSERT in designer_settings table
 - issue #11798 Fix handling of databases with dot in a name
+- issue #11820 Fix hiding of page content behind menu
 
 4.5.3.1 (2015-12-25)
 - issue #11774 Undefined offset 2

js/cross_framing_protection.js

@@ -2,7 +2,7 @@
 /**
  * Conditionally included if framing is not allowed
  */
-window.onload = function () {
+$(function () {
     if (self == top) {
         var style_element = document.getElementById("cfs-style");
         // check if style_element has already been removed
@@ -13,4 +13,4 @@ window.onload = function () {
     } else {
         top.location = self.location;
     }
-}
+});