resorted SvTreeLists munged horribly

e.g. tools->options->paths, click the sort icon, reclick it few
times and the list doesn't reverse but instead shows the
same two entries over and over again.

Regression since fb01d8e1

Change-Id: Ifc151ad72a27f1cdc3141e356ad6d100e6219cc2

svtools/source/contnr/treelist.cxx

@@ -1554,6 +1554,7 @@ void SvTreeList::ResortChildren( SvTreeListEntry* pParent )
             // Recursively sort child entries.
             ResortChildren(p);
     }
+    SetListPositions(pParent->maChildren); // correct list position in target list
 }
 
 void SvTreeList::GetInsertionPos( SvTreeListEntry* pEntry, SvTreeListEntry* pParent,