more reliable detecting of changes in the combobox lineedit
more reliable detecting of changes in the combobox lineedit

Change-Id: I3563a961c54e235fffe0c2ab1809f51882ba3831

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