Hi 
Is this set by the OS rather than by LibreOffice? Oddly it does work for
me on Ubuntu 14.04.
However that might be due to installing the entire KDE desktop. It's tons
of bloat but gives me the advantage that other people logging into my
machine can use the more familiar environment. I probably wouldn't have 2
DEs on a machine that is really my own. We now have 2 machines that don't
have Windows on at all
They are both the most used while each of the
Windows ones is only being used part of the week :))
Kubuntu desktop remembers all the things i had open when i shutdown and
attempts to place the windows in much the same way while also trying to
avoid having windows overlapping.
To get the whole of KDE for ubuntu i 'just' ran
sudo apt-get install kubuntu-desktop
and left it alone for several hours (well, felt like hours).