Comment 72 for bug 998156

Added gtk+2.0 task as many important applications in Ubuntu (Inkscape, GIMP, Firefox, Thunderbird, ...) are still based on GTK 2. So it is really important to apply the fix also there. This should not be too complicated as the print dialog did not change much between GTK 2 and GTK 3. Note that the fix is especially important as Inkscape and GIMP are typical applications from which one prints on custom paper sizes.