[Libreoffice] [REVIEW] Fix losing changes in a table in writer

[Jan Holesovsky]

Hi,

https://bugs.freedesktop.org/show_bug.cgi?id=38374

In the document attached to the bug, when you copy the described table,
do edits there, and save it as .doc, the changes are lost.  These are in
fact 2 bugs, but I fixed the more serious one.  One is that when you
copy/paste a fieldmark, the essential attributes are not preserved;
later, when saving, the fieldmark is of unknown type, and ignored.  We
should save even the unknown fieldmarks I think, but here I fixed the
root cause - that the attributes are not copied.

Patch attached, please sign-off, and push to libreoffice-3-4.

Thank you,
Kendy