Locate not found files

[Zurga]

v12 - Locate not found media files. Not found files will show an in memory _FOUND tag to assure that the files is found on your computer.
v12 - Allow to see hidden files in file choosers
v12 - Aries Editor : Add delete event button.
v12 - Italian translation update (thanks Paolo )
v12 - Portuguese translation update (thanks Pedro )
v12 - Castellan and Catalan translations update (thanks Jordi )
v12 - Danish translation update (many thanks Bernth )