so the generated list of files does not conflict with the main package

Currently, those are used within an extension function used by the
Word 2003 ML XSLT filters

* forms.OGridControlModel::com::sun::star::form::component::GridControl
* forms.OGridControlModel::com::sun::star::beans::XMultiPropertySet
* forms.OGridControlModel::com::sun::star::beans::XPropertySet
* forms.OGridControlModel::com::sun::star::beans::XFastPropertySet

 - chart2/qa/unoapi
 - configmgr/qa/unoapi
 - dbaccess/qa/unoapi
 - forms/qa/complex/forms
 - linguistic/qa/unoapi
 - qadevOOo/qa/unoapi
 - sd/qa/unoapi
 - starmath/qa/unoapi
 - ucb/qa/complex/ucb
 - ucb/qa/unoapi
 - unotools/qa/complex/tempfile

Virtual operator=() is IMO pointless, and especially in a class hierarchy
like SdrObject it's pretty unlikely one could reasonably assign any
SdrObject-based object to any other one. Moreover, it was actually
only used in Clone(), which was almost never reimplemented, so the
more sensible choice is to have non-virtual operator= and virtual
Clone() always being reimplemented and using that.

This commit also fixes various smaller or bigger, er, interesting
details in the various operator= implementations.

Conflicts:
	package/source/zippackage/ZipPackageFolder.cxx

Conflicts:
	automation/source/communi/communi.cxx
	automation/source/server/recorder.cxx
	automation/source/server/server.cxx
	basctl/source/basicide/basobj2.cxx