Drop old epiphany and evince file naming style, prefer Papers over Evince,
gnome-text-editor can handle some more text files, prefer gnome-music over
rhythmbox, application/x-shockwave-flash is not supported by any of the listed
apps for a long time, handle thunderbird desktop files too.
Signed-off-by: Pacho Ramos <pacho@gentoo.org>
73cba31bf7