From f50aa0f15e10d7feaa3fbab35b005a812377dbb0 Mon Sep 17 00:00:00 2001
From: Alex Pott <alex.a.pott@googlemail.com>
Date: Sat, 20 Jul 2013 21:28:59 +0100
Subject: [PATCH] Issue #1788888 by jsacksick, David_Rothstein: Fixed Overlay
 at admin/modules closes on submitting the form.

---
 core/modules/overlay/overlay.module | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/core/modules/overlay/overlay.module b/core/modules/overlay/overlay.module
index 3e6f989c347..05c6fb8febf 100644
--- a/core/modules/overlay/overlay.module
+++ b/core/modules/overlay/overlay.module
@@ -462,7 +462,10 @@ function overlay_get_mode() {
  */
 function overlay_set_mode($mode = NULL) {
   global $base_path;
-  $overlay_mode = &drupal_static(__FUNCTION__);
+  // We're not using drupal_static() here since the static cache is reset in
+  // drupal_flush_all_caches(); this could lead to the loss of the overlay when
+  // submitting the admin/modules form, for instance.
+  static $overlay_mode;
 
   // Make sure external resources are not included more than once. Also return
   // the current mode, if no mode was specified.