Merge remote-tracking branch 'origin/QA_4_5' into QA_4_5

ChangeLog

@@ -21,6 +21,7 @@ phpMyAdmin - ChangeLog
 - issue #11639 Bug with the MainBackground Color
 - issue        Profiling checkbox is missing
 - issue #11642 Properly handle session expiry after POST requests
+- issue #11648 Notice in ./export.php#214 Undefined index: quick_or_custom
 
 4.5.1.0 (2015-10-23)
 - issue        Invalid argument supplied for foreach()

export.php

@@ -211,7 +211,7 @@ if (!defined('TESTSUITE')) {
     $separate_files = '';
 
     // Is it a quick or custom export?
-    if ($_REQUEST['quick_or_custom'] == 'quick') {
+    if (isset($_REQUEST['quick_or_custom']) && $_REQUEST['quick_or_custom'] == 'quick') {
         $quick_export = true;
     } else {
         $quick_export = false;