I recently ported MAT to Glade, and improved a little bit the interface.
Some things are still missing, everything may no be polished, but I'm
working on it. By the way, the MAT now supports files with a '\n' in
their names.
I think that I'll soon do an RC to get feedback, since I may have broken
a awful lot of things during the port to GTK3/Glade.
I think that the next Great Goal™ for 4.1 will be to improve MAT's
filenames encoding agnosticism.
PS: Translations are broken for now, I know, it's on my TODO-list.