move namepast.cxx to namedlg
namedefdlg is "modeless"(only in technical sense) and needs to be in sc
while namepast is modal and needs to be in scui
move the table implementation to an own file, we can reuse it for
namepast.cxx

missing are:
-undo
-range options
-help
-test for correct expression is not working

the new concept does not have an dialog local undo stack, instead we use
the global undo stack

Discovered by Michael Meeks <michael.meeks@suse.com>.

It was due to a simple mis-placement of an operator.  No idea how
the compiler may have parsed that statement...

Some (presumably Russian) 3rd party programs generate invalid xls docs
that have BOUNDSHEET record pointing to invalid BOF record position.
The real BOF position may be before or after the record pointed to by
the BOUNDSHEET.

So, let's check if the BOUNDSHEET points to a valid BOF, and if not,
manually search for one from the BOUNDSHEET record position.

The paragraph properties weren't propagated to the empty paragraphs in
the tables. Called checkNeedPap() to do that job when finding \par.