# HG changeset patch
# User Charlie Root
# Date 1516279624 18000
# Node ID 1ab920879b881c7381b18ea9ff6f8390f32698a6
# Parent  bb8aca0e35ee415f8ba8c33334144d2375711f99
do date sort if sorting on dates, to get sub-threads in date order.  See also thunderbird-labels.php:407 et seq.

diff -r bb8aca0e35ee -r 1ab920879b88 program/steps/mail/list.inc
--- a/program/steps/mail/list.inc	Wed Jan 17 09:17:04 2018 -0500
+++ b/program/steps/mail/list.inc	Thu Jan 18 07:47:04 2018 -0500
@@ -68,7 +68,7 @@
 // fetch message headers
 if ($count = $RCMAIL->storage->count($mbox_name, $threading ? 'THREADS' : 'ALL', !empty($_REQUEST['_refresh']))) {
   $sort_col = rcmail_sort_column();
-  $a_headers = $RCMAIL->storage->list_messages($mbox_name, NULL,($sort_col == 'dates')? NULL : $sort_col , rcmail_sort_order());
+  $a_headers = $RCMAIL->storage->list_messages($mbox_name, NULL,($sort_col == 'dates')? 'date' : $sort_col , rcmail_sort_order());
 }
 #rcube::write_log('mail',"list fetch: $count ".count($a_headers));
 // update search set (possible change of threading mode)