TextFieldWithBrowseButton now opens native file dialog on Mac

Sorry if this is an FAQ, but prior to 2016.3 EAP when I click on the browse button, it opened an IntelliJ file selection dialog, and all my FileChooserDescriptor settings worked. E.g. in one of my plugins I have:

final FileChooserDescriptor myDescriptor = new FileChooserDescriptor(true, false, false, false, false, false)
        .withHideIgnored(true).withShowHiddenFiles(false).withFileFilter(new Condition<VirtualFile>() {
            @Override
            public boolean value(VirtualFile virtualFile) {
                String fn = virtualFile.getName().toLowerCase();
                return (fn.endsWith(".xxx") || fn.endsWith(".yyy"));
            }
        });

and I was only able to see and select .xxx or .yyy files. Now in 206.3 EAP I see the native OS X dialog and it allows me to see and select any file. What am I missing here?