Header/Footer: switch cursor between header and footer using the cursor
Header/Footer: switch cursor between header and footer using the cursor

This fixes commit cce76e658af88813e17dea4f04388a29d7e582df.

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