RCP: X.X, corpus custom media files discovery

Enable Corpus level preferences for the org.txm.backtomedia extension

Solution

Use TXM 0.8.0 Project preferences to store additional preferences: https://groupes.renater.fr/wiki/txm-info/public/specs_multimedia#acces_aux_fichiers_media

(from redmine: issue id 2608, created on 2019/07/15 by Matthieu Decorde)

added product::mediaplayer type::bug + 1 deleted label

changed milestone to %MediaPlayer

closed

assigned to @mdecorde