update autoscrolls on text modifications
update autoscrolls on text modifications

not just on SetText or Resize

Change-Id: I9991125d8f5eaa527e2cf274222c94b6d6cc1069

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