tdf#91100 - don't Notify focus changes after dispose.
tdf#91100 - don't Notify focus changes after dispose.

Change-Id: If870f88d1d83db8bd436ac1bb9a1c676c34605b5

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core