No margin on Gtk3 print widget

[VK2BEA]

There is no margin on the bottom / right side of Preview / Cancel / Print dialog (created by gtk_print_operation_run).
This seems to be the case with all the Mac themes (MacOS / Yosemite / Cheetah / Mavericks etc)

[Elbullazul]

does it happen with other non-mac themes too?

[VK2BEA]

no, just on mac like themes