From d1749659d25c5b68600aef3557284cedff8dded1 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Thu, 31 Jul 2014 08:16:05 -0400
Subject: [PATCH] Backported option to set default message list mode - default_list_mode (#1487312)

---
 program/steps/mail/func.inc |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/program/steps/mail/func.inc b/program/steps/mail/func.inc
index 10e0af6..5cf5dfd 100644
--- a/program/steps/mail/func.inc
+++ b/program/steps/mail/func.inc
@@ -142,6 +142,7 @@
 {
     global $RCMAIL;
 
+    $default_threading  = $RCMAIL->config->get('default_list_mode', 'list') == 'threads';
     $a_threading        = $RCMAIL->config->get('message_threading', array());
     $message_sort_col   = $RCMAIL->config->get('message_sort_col');
     $message_sort_order = $RCMAIL->config->get('message_sort_order');
@@ -181,13 +182,15 @@
                 $RCMAIL->storage->set_page($_SESSION['page'] = 1);
             }
 
-            unset($a_threading[$_SESSION['mbox']]);
+            $a_threading[$_SESSION['mbox']] = false;
         }
 
         $RCMAIL->user->save_prefs(array('message_threading' => $a_threading));
     }
 
-    $RCMAIL->storage->set_threading($a_threading[$_SESSION['mbox']]);
+    $threading = isset($a_threading[$_SESSION['mbox']]) ? $a_threading[$_SESSION['mbox']] : $default_threading;
+
+    $RCMAIL->storage->set_threading($threading);
 }
 
 /**

--
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