Acelle Email Marketing Web Application 4.0.26-p68

* Fixed: message-id cannot be retrieved in bounced message
* Fixed: JS error showing up in the edit template page
* Fixed: lagging image/video in the email editor
* Fixed: thumbnail not showing up correctly
* Fixed: user cannot subscribe to certain plans
* Fixed: speed up the customers list view

* Fixed: issue with automation for subscriber events
* Fixed: automation follow-up email not triggered in certain cases
* Fixed: incorrect quota counting in certain cases
* Fixed: cannot subscribe customer to a plan as administrator
* Fixed: prevent double subscription
* Fixed: check to make sure public/ folder is writable while installing
* Changed: queued campaign is now of QUEUED status (READY is no longer used)
* Changed: SMTP encryption is no longer a required field
* Changed: remove GMP extension validation as it is no longer required

* Added: subscribers count by unique email
* Added: more test scripts
* Fixed: fix potential security issues related to CSRF
* Fixed: upgrade will no longer overwrite custom translation
* Fixed: campaign does not pause in certain cases
* Fixed: CSV export may not work correctly