So; if you have a blank, un-touched OO.o toplevel around, and you re-run an
soffice -writer, you simply get a 'raise window' on the original instance.

This is really irritating in Unix, since no other application behaves like this,
and frequently the application is on another desktop, so it just _looks_ as if
nothing has happened.

The attached patch fixes this;

It also fixes an allied issue whereby if you do:

./soffice -writer /tmp/foo.doc

You get a single instance editing /tmp/foo.doc

but if subsequently - using the factory you re-do:

./soffice -writer /tmp/baa.doc

You get /tmp/baa.doc in a new frame, and also a new blank document [ presumably
previously the duplicate 'appear' simply raised this new window redundantly ].

Anyhow - this appears to improve the ergonomics for me :-)

HTH.