Mailster - Email Newsletter Plugin for WordPress 4.1.7

new: Admin header bar with new support integration.
new: Help buttons located in the plugin to provide context-specific assistance
changed: Mailster related notices only show up on Mailster related pages.
fixed: campaign related conditions for "Any Campaign" now work as expected.
fixed: restoring of deleted subscribers working again.
fixed: issue where some subscribers are not able to get deleted/exported
fixed: missing object error in mailster-script
fixed: searching with quotes on the subscribers page working again
fixed: broken RSS feed URL can cause timeouts
fixed: force array when duplicating a campaign for wp_insert_post
change: do not use the $wp_filesystem global when require filesystem
added: mailster_get_user_setting and mailster_set_user_setting

Do not show form occurrences from auto draft posts
allow selection private post in the static editbar
implemented feed item date checks
improved handling of images in RSS feeds
added new status upgrade status code
remove any tinyMCE attributes from the content on campaign save
use vanilla methods to change target on frontpage

fixed: E_ERROR on Geo location class in PHP 8.1
added enhancement issue template
check if option from queue has template element
fixed: footer branding
fixed: Uncaught TypeError: in notifications.class.php
standardize outgoing URLs
tested up to 6.1