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

src/common/preferencescmn.cpp

@@ -23,6 +23,8 @@
     #pragma hdrstop
 #endif
 
+#if wxUSE_PREFERENCES_EDITOR
+
 #include "wx/private/preferences.h"
 #include "wx/intl.h"
 
@@ -67,3 +69,5 @@ void wxPreferencesEditor::Dismiss()
 {
     m_impl->Dismiss();
 }
+
+#endif // wxUSE_PREFERENCES_EDITOR