Default button should be "help"
Binary package hint: orca
when orca gets focus it reads out "orca screen reader slash magnifier frame preferences button" pressing return leads you to a complicated screen of options. If the default button was the help button then pressing space or return might actually take you to some kind of information on how to use it (Orca is pretty poor at reading you it's own help files but that is a separate issue)
|affects:||orca (Ubuntu) → gnome-orca (Ubuntu)|