Migrating from 5.5.2 to 5.5.3

Fixes and new features

• Bugfix: Handle the case where users could upload files to the feedbackfeed, and remove them, and then submit an empty comment.

Backup database and files

BACKUP. YOUR. DATABASE. AND. FILES.

Update devilry to 5.5.3

Update the devilry version to 5.5.3 as described in Update Devilry.