bnc#885548: Set the date time mode to non-fixed after the import is done.
bnc#885548: Set the date time mode to non-fixed after the import is done.

So that the new revisions will correctly record time stamps.

Change-Id: I7d9b26bed04a95ce2652224faa0f214562818970

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