SwXTextField: make sure we always insert the field at the end
SwXTextField: make sure we always insert the field at the end

Change-Id: I5070a4226affaa274e3fbe61d2f2cd182c8bc3bf

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