vertically center button rather than stretch it
vertically center button rather than stretch it

Change-Id: I63b7c8a671e1ca4a41e047fdca313e1af972861f

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