fixed a list-watcher cell-editing bug

snap.html

@@ -9,7 +9,7 @@
         <script src="src/widgets.js?version=2020-05-06"></script>
         <script src="src/blocks.js?version=2020-06-24"></script>
         <script src="src/threads.js?version=2020-06-25"></script>
-        <script src="src/objects.js?version=2020-06-20"></script>
+        <script src="src/objects.js?version=2020-06-26"></script>
         <script src="src/gui.js?version=2020-06-24"></script>
         <script src="src/paint.js?version=2020-05-17"></script>
         <script src="src/lists.js?version=2020-05-18"></script>

src/objects.js

@@ -84,7 +84,7 @@ BlockEditorMorph, BlockDialogMorph, PrototypeHatBlockMorph,  BooleanSlotMorph,
 localize, TableMorph, TableFrameMorph, normalizeCanvas, VectorPaintEditorMorph,
 HandleMorph, AlignmentMorph, Process, XML_Element, WorldMap, copyCanvas*/
 
-modules.objects = '2020-June-20';
+modules.objects = '2020-June-26';
 
 var SpriteMorph;
 var StageMorph;
@@ -10965,7 +10965,7 @@ CellMorph.prototype.reactToEdit = function (textMorph) {
         if (listWatcher) {
             listWatcher.list.put(
                 textMorph.text,
-                this.idx + listWatcher.start - 1
+                this.idx
             );
         }
     }