I would like to tell all of you I AM very sorry for my wrong information on
my previously posted post.
LXDE and build in Thunar speak desktop items by default so it is not
necessary to install mate and enable accessibility support from Mate to get
it work from LXDE.
But you must press right or left arrow keys, not up or down.
But I have other plea.
Which links should I add to The /etc/sources/apt.list so I would be able to
install dependencies for some app which is available in side repositories?
I love command
apt build-dep package name.
Thanks to this command, it is possible to modify source codes of some apps
and recompile them, because command install needed dependencies.
I have some idea for extending one app and I believe, that I have The chance
to do it myself.