Add wxUSE_PREFERENCES_EDITOR and the corresponding configure option.

This was somehow forgotten when wxPreferencesEditor was added.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74532 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/os2/setup0.h

@@ -1098,6 +1098,16 @@
 // Recommended setting: 1
 #define wxUSE_NOTIFICATION_MESSAGE 1
 
+// wxPreferencesEditor provides a common API for different ways of presenting
+// the standard "Preferences" or "Properties" dialog under different platforms
+// (e.g. some use modal dialogs, some use modeless ones; some apply the changes
+// immediately while others require an explicit "Apply" button).
+//
+// Default is 1.
+//
+// Recommended setting: 1 (but can be safely disabled if you don't use it)
+#define wxUSE_PREFERENCES_EDITOR 1
+
 // wxRichToolTip is a customizable tooltip class which has more functionality
 // than the stock (but native, unlike this class) wxToolTip.
 //