Adwaita: ease-out-quad in place of ease-out

Generally changed the transition timing function to ease-out-quad
which is described by cubic-bezier(0.25, 0.46, 0.45, 0.94), feels
better to me.
Get media-col-default attribute correctly

Fix a typo which caused that "number-up-supported" and "media-col-default"
IPP attributes were not requested correctly.

https://bugzilla.gnome.org/show_bug.cgi?id=725441