SwPageDesc: let IsHeaderShared() not affect IsHeaderSharedFirst()
SwPageDesc: let IsHeaderShared() not affect IsHeaderSharedFirst()

Change-Id: I23224f4b408e36a858cd8ce6b1cfbdaac2bf4b60

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