Applied patch for wxComboBox and wxListBox to

prevent "hanging" in single selection mode.
    Also removed call to AddPendingEvent and
    changed wxLB_EXTENDED mode so that no changes
    to the listbox go unnoticed.
  I do wonder what the difference between multiple
    and extended list boxes actually are.
  Not suer what I changed in the other files.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11310 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/combobox.h

@@ -114,6 +114,7 @@ public:
     bool     m_alreadySent;
     wxList   m_clientDataList;
     wxList   m_clientObjectList;
+    int      m_prevSelection;
 
     void DisableEvents();
     void EnableEvents();

include/wx/gtk/listbox.h

@@ -96,6 +96,7 @@ public:
     bool       m_hasCheckBoxes;
 #endif // wxUSE_CHECKLISTBOX
 
+    int      m_prevSelection;
 protected:
     virtual wxSize DoGetBestSize() const;