Changelog:
-Support new properties from HEIF DAM 2:
 -Required reference types
 -User description
 -Accessibility text
 -Image scaling
 -Creation time information
 -Modification time information
-Support for Extended type box and Type combination box.
-Support for image items with decoding dependencies.
-Support associating item properties for entity groups.
-Reader support for segmented tracks.
-Various improvements, clean-ups and minor bug-fixes.