does not set high enough Virtual resolution in xorg.conf

/usr/share/screen-resolution-extra/policyui.py sets Virtual 2048x2048 by default if _any_ of horiz or vert resolution requested by the user is lower than 2048.
Thus is does not correctly set the Virtual field for two monitors side by side (1680x1050 + 1280x800)

Making the 'or' to and 'and' makes it work for my setup, not sure if that was intended or a bug.
If intended another fix is needed bcause currently even if gnome-control-center allow one to correctly set up the monitors graphically, xorg.conf is not written correct data and on relogin the setup is not working.

here's the check

   if int(self.resolution[0]) < int(self.optimal_virtual_resolution[0]) and \
           int(self.resolution[1]) < int(self.optimal_virtual_resolution[1]):
            self.resolution = self.optimal_virtual_resolution