Move recalc on-load to after ScDocumentImport::finalize().

Doing this would avoid re-grouping formula cells twice.

(cherry picked from commit 06b3ccf8069c6478634dc218eaad3f02ecbfbc85)

Conflicts:
	sc/source/filter/oox/workbookfragment.cxx

Change-Id: I732658fc92f2fb3ddde0c0c00ae85f72074b6b48