styles dropdown: Show only the triangle for the dropdown.
styles dropdown: Show only the triangle for the dropdown.

The entire button appears on mouse over.

Change-Id: I27e713f75a30ec4a2b271d813fcbcbe8c91a4180

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