Release 1.5.3

• Enigma: Fix initial synchronization of private keys
• Enigma: Fix double quoted-printable encoding of pgp-signed messages with no attachments (#8413)
• Fix various PHP8 warnings (#8392)
• Fix mail headers injection via the subject field on mail compose (#8404)
• Fix bug where small message/rfc822 parts could not be decoded (#8408)
• Fix setting HTML mode on reply/forward of a signed message (#8405)
• Fix handling of RFC2231-encoded attachment names inside of a message/rfc822 part (#8418)
• Fix bug where some mail parts (images) could have not be listed as attachments (#8425)
• Fix bug where attachment icons were stuck at the top of the messages list in Safari (#8433)
• Fix handling of message/rfc822 parts that are small and are multipart structures with a single part (#8458)
• Fix bug where session could time out if DB and PHP timezone were different (#8303)
• Fix bug where DSN flag state wasn't stored with a draft (#8371)
• Fix broken encoding of HTML content encapsulated in a RTF attachment (#8444)
• Fix problem with aria-hidden=true on toolbar menus in the Elastic skin (#8517)
• Fix bug where title tag content was displayed in the body if it contained HTML tags (#8540)
• Fix support for DSN specification without host e.g. pgsql:///dbname (#8558)