Add comment and revert changes to variable

Author: marthacryan

Diff for: packages/python/plotly/js/widget.ts

@@ -968,7 +968,7 @@ export class FigureView {
     if (_.isNil(layout) || _.isNil(layout.width)) {
       // @ts-ignore
       Plotly.Plots.resize(that.el).then(function () {
-        var layout_edit_id = that.model.get("_last_widget_layout_edit_id");
+        var layout_edit_id = that.model.get("_last_layout_edit_id");
         that._sendLayoutDelta(layout_edit_id);
       });
     }

Diff for: packages/python/plotly/plotly/basewidget.py

@@ -730,6 +730,10 @@ def _repr_mimebundle_(self, include=None, exclude=None, validate=True, **kwargs)
         Return mimebundle corresponding to default renderer.
         """
         display_jupyter_version_warnings()
+
+        # Widget layout and data need to be set here in case there are
+        # changes made to the figure after the widget is created but before
+        # the cell is run. 
         self._widget_layout = deepcopy(self._layout_obj._props)
         self._widget_data = deepcopy(self._data)
         return {