vcldemo: add a tooltip to debug rendering issue.
vcldemo: add a tooltip to debug rendering issue.

Change-Id: Ic7c02736505969c3d74acc59b80794b3be62bf6b

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