Use wxWS_EX_VALIDATE_RECURSIVELY in native Cocoa wxPreferencesEditor too.

Transfer data recursively for consistency with the generic implementation and
because this generally just makes more sense.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@76327 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775