prioritize urls over text; fixes linux fm drop (#945)
remember window size for deck&model selection (#931)
make sure we escape html chars after type ans comp. (#960)
make sure we decode full traceback on addon err (#954)
strip html in duplicate check (#906)
define standard encoding for unicode (#893)

- always store media references in fields in NFC form
- always encode filenames on disk in NFC form on machines other than macs
- use relevant encoding when placing files in the media folder during syncs
  and apkg imports as well
- rename 'unused media' back to 'check media'
- check media can now automatically change media references and filename
  encodings to the correct format
add internal option to disable burying on answer