to support the registered databases (containing ODS, XLSX
sheet or ODT text table data sources).

Now database fields don't lose their database connection,
and File->Print can merge mails after DOCX export/import, if
the LO instance has got a registered database with the same
name and table, as in saved in w:settings/w:mailMerge/w:query
element of the DOCX document in the form of

SELECT * FROM [databaseName].dbo.[tableName]$

query.

Notes:

– This fix supports only single table usage.

– The exported DOCX document is editable in MSO, too,
  without losing the database connection in LO later.

Change-Id: I97826b7ee7defd0243dbaffa0325c5b11dd2c0d1
Reviewed-on: https://gerrit.libreoffice.org/71228
Tested-by: Jenkins
Reviewed-by: László Németh <nemeth@numbertext.org>