fdo#69282: sw: fix updating of page styles via SwDocShell::_LoadStyles()

SwDoc::CopyPageDesc() only copies master and left SwFrmFmt attributes,
but not first-master and first-left.  They will contain exactly the same
attributes as master and left but they still need to be copied...

(see also: that FIXME in pagedesc.hxx)

(regression from 75084f6c)

Change-Id: I3dcc3627708b5d6a477eb7fef76cf6c42c95c004

sw/source/core/doc/docfmt.cxx

@@ -1443,6 +1443,22 @@ void SwDoc::CopyPageDesc( const SwPageDesc& rSrcDesc, SwPageDesc& rDstDesc,
 
         rDstDesc.GetLeft().DelDiffs( aAttrSet );
         rDstDesc.GetLeft().SetFmtAttr( aAttrSet );
+
+        aAttrSet.ClearItem();
+        aAttrSet.Put( rSrcDesc.GetFirstMaster().GetAttrSet() );
+        aAttrSet.ClearItem( RES_HEADER );
+        aAttrSet.ClearItem( RES_FOOTER );
+
+        rDstDesc.GetFirstMaster().DelDiffs( aAttrSet );
+        rDstDesc.GetFirstMaster().SetFmtAttr( aAttrSet );
+
+        aAttrSet.ClearItem();
+        aAttrSet.Put( rSrcDesc.GetFirstLeft().GetAttrSet() );
+        aAttrSet.ClearItem( RES_HEADER );
+        aAttrSet.ClearItem( RES_FOOTER );
+
+        rDstDesc.GetFirstLeft().DelDiffs( aAttrSet );
+        rDstDesc.GetFirstLeft().SetFmtAttr( aAttrSet );
     }
 
     CopyHeader( rSrcDesc.GetMaster(), rDstDesc.GetMaster() );