Topic: Text file format, header right-click and qtf file

Bugs have been discovered and need to be fixed :

* Bug : automatic text file format recognition used for %T (thanks to Jaroslav)
* Bug : crash when right clicking in the file list on the column header after the last one (thanks to Frédéric)
* Bug : audio/video variable storage for some qtf files
* Minor modifications

Siren 3.11 beta version is on its way