Fix dict changing size problem in retry_decrypt_..

Also add a copy() method to models, and make them able
to not have a sync_id (in which case they won't send pyotherside
events).

src/gui/PythonBridge/Privates/EventHandlers.qml

@@ -60,13 +60,13 @@ QtObject {
 
 
     function onModelItemInserted(syncId, index, item) {
-        // print("insert", syncId, index, item)
+        print("insert", syncId, index, item)
         ModelStore.get(syncId).insert(index, item)
     }
 
 
     function onModelItemFieldChanged(syncId, oldIndex, newIndex, field, value){
-        // print("change", syncId, oldIndex, newIndex, field, value)
+        print("change", syncId, oldIndex, newIndex, field, value)
         const model = ModelStore.get(syncId)
         model.setProperty(oldIndex, field, value)