readjust the combobox optimal size calculation, needs to be more stable
readjust the combobox optimal size calculation, needs to be more stable

Change-Id: I1e9b07e5e5e53ae62baa77610f47083b580eaf7d

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