Make resize work with DEs/WMs that don't support backend changes
When using xfce in the guest, the guest resolution is not automatically switched on resize. However, it does appear in display settings. A known workaround is
xrandr --output Virtual-0 --auto which tells X to switch to the preferred resolution (which is the one just added by spice).
Would it be possible to make a configuration flag that lets spice-vdagent do this switch, so that there is an easy workaround to make spice play nicely with xfce and any other WMs/DEs that do not support the method used?