release 1.2.3
*** 1.2.3 (Martin Hecht: 20-Aug-2016) ***
fix query for position in upgrade script, thanks to norhei for reporting
fix drag and drop in ajax helper, thanks to florian for reporting
honor redirection_timer in ajax notifications, thanks to florian for this hint
*** 1.2.2 (Martin Hecht: 18-Aug-2016) ***
two typo fixes in view_submissions, thanks to norhei for reporting