Bug 214114: Double-click on folder opens new window AND goes to new messages; p=Tuukka Tolvanen <tuukka.tolvanen@gmail.com>/me, r/sr=bienvenu

mail/app/profile/all-thunderbird.js

@@ -198,6 +198,7 @@ pref("mail.trusteddomains", "");
 // hidden pref for changing how we present attachments in the message pane
 pref("mailnews.attachments.display.largeView", false); 
 pref("mail.pane_config.dynamic",            0);
+pref("mailnews.reuse_thread_window2",     true);
 pref("mailnews.display.sanitizeJunkMail", true);
 pref("mail.standalone", true); 
 pref("editor.singleLine.pasteNewlines", 4);  // substitute commas for new lines in single line text boxes

mail/base/content/msgMail3PaneWindow.js

@@ -1387,7 +1387,7 @@ function FolderPaneDoubleClick(folderIndex, event)
         server.performExpand(msgWindow);
       }
     }
-    else 
+    else if (!pref.getBoolPref("mailnews.reuse_thread_window2"))
     {
       // Open a new msg window only if we are double clicking on 
       // folders or newsgroups.

mailnews/base/resources/content/msgMail3PaneWindow.js

@@ -1315,7 +1315,7 @@ function FolderPaneDoubleClick(folderIndex, event)
         server.performExpand(msgWindow);
       }
     }
-    else 
+    else if (!pref.getBoolPref("mailnews.reuse_thread_window2"))
     {
       // Open a new msg window only if we are double clicking on 
       // folders or newsgroups.

mailnews/mailnews.js

@@ -340,6 +340,7 @@ pref("ldap_2.prefs_migrated",      false);
 pref("mailnews.confirm.moveFoldersToTrash", true);
 
 pref("mailnews.reuse_message_window", true);
+pref("mailnews.reuse_thread_window2", false);
 pref("mailnews.open_window_warning", 10); // warn user if they attempt to open more than this many messages at once
 
 pref("mailnews.start_page.url", "chrome://messenger-region/locale/region.properties");