new: Remove inactive Subscribers automatically
new: Relative conditions for date fields
new: filters in the subscriber overview
updated: Manage Subscribers page
fixed: add trailing space to preheaders to prevent unintentional line breaks in previews.
fixed: saving template from editor messed up template header
fixed: bulk deletion with actions working again
fixed: auto responder no longer triggered if post is published in the past
fixed: shortcodes are now handled properly on the web version
added: text strings for error messages defined by the security settings page
improved: ajax handler
fixed: bulk options causes a subscriber query error.
fixed: duplicating forms throw an error.
fixed: some notifications missed template defined settings.
change: optional warmup has been extended to 60 days.
improved: database errors during cron tried to get fixed automatically.
added: reminder to enable auto updates after a Mailster update.
