compress-dialog-controller: Fit popover fit on X11

Under X11, GTK3 cannot draw a GtkPopover outside of the main window area.

This means the popover for compress formats is clipped under X11.

As a workaround, make the window twice as tal when the popover is shown.

Fixes https://gitlab.gnome.org/GNOME/nautilus/-/issues/2018

(cherry picked from commit 203d24f1)