Added IsTopLevel() as a virtual function.

Added fontenum.hto filelist.txt,
  Changed window positioning code again,
  some more related things.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4372 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/motif/mdi.h

@@ -169,6 +169,8 @@ public:
     virtual void Activate();
     virtual bool IsIconized() const ;
 
+    virtual bool IsTopLevel() const { return FALSE; }
+    
     // Is the frame maximized? Returns TRUE for
     // wxMDIChildFrame due to the tabbed implementation.
     virtual bool IsMaximized(void) const ;