Implemented DoGetBestSize for wxListBox, (native) wxComboBox and

wxTextCtrl, and used it when wxSize(-1, -1) is passed to Create, to set
the initial size.
  Added wxDoChangeFont and wxXmStringToString helper functions, removed
the use of m_stringList in native wxComboBox, removed some duplicated code
in wxWindow.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@19296 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/motif/combobox.h

@@ -91,6 +91,9 @@ protected:
     virtual void DoSetSize(int x, int y,
         int width, int height,
         int sizeFlags = wxSIZE_AUTO);
+private:
+    // only implemented for native combo box
+    void AdjustDropDownListSize();
 };
 
 #endif