fdo#53531: Time field can be represented with an extended time field type.
fdo#53531: Time field can be represented with an extended time field type.

And Calc's header footer currently don't distinguish between time and
extended time.  Time fields in the header / footer are always dynamic
and never static.

Change-Id: If628d179968c270a63d38cdc3bf6018c01241ac1

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