The button did make sense in BeOS where there was no printer
selection dialog. The dialog is enabled in Haiku per default
and clicking the "Preview" button closes the job setup dialog
and returns to the printer selection dialog.
The preview is shown after the printer selection dialog is
closed clicking on the "OK" button.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39192 a95241bf-73f2-0310-859d-f6bbb57e9c96