startlxqt: Copy existing openbox config preferably
startlxqt: Copy existing openbox config preferably

In case the lxqt-rc.xml does not exist, try to use rc.xml. Only if not
available copy our predefined configuration file.

lxde/lxqt-session,stefonarch/lxqt-session,lxde/lxqt-session,stefonarch/lxqt-session,stefonarch/lxqt-session,lxde/lxqt-session