issue #4915 "fix ipywidgets" -- added commnets if someone else in future will continue this.
issue #4915 "fix ipywidgets" -- added commnets if someone else in future will continue this.

ScottPJones/beaker-notebook,ScottPJones/beaker-notebook,ScottPJones/beaker-notebook,ScottPJones/beaker-notebook,ScottPJones/beaker-notebook