V0.6.6 - Finia

New features:

• Added handling of different virtual environment names on selfupdate
• Added handling float-type custom columns
• Updated translations

Bug Fixes:

• Fix for using werkzeug 1.0.0
• Pinned dependencies to current version as maximum
• Fix viewing logfile
• Fix Autodetection of Locale for guest user
• Fix Shelfs are reordering again
• Fix Auth-digest Header no longer crashs calibre-web
• Fix Windows with tornado and python <3.8 working
• Fix Print button no longer visible in pdf reader if user has no download rights
• Fix display of covers for downloaded books in usersection
• Fix for missing referrer on send to kindle
• Fix invalid file extensions on Kindle Paperwhite download
• Fix shutown tornado-server
• Fix fix custom column display that contain colons in Caliblur theme