Objectives
------------------
- test validity of using property providers to separate UI logic from model objects
- display persistence type (embedded or file ref) in properties for non string resources
- enable conversion between embedded and file ref resource types for images and audio
- decide if i have enough time to implement refactoring plan for resource entry classes into image / audio / string / other-file, other-embedded resource classes and displaying them in separate tabs in the UI.
Bonus
----------
- add support for switching between byte[] / string type file ref resources