OutputWidget and Selection widget enhancements

[fleming79]

Output

This change adds a new class to subclass the SimplifiedOutputArea in place of the JupyterLuminoPanelWidget for the Output area. SimplifiedOutputArea was deliberately chosen instead of OutputArea.

Before

Internally the layout is applied to a widget that contains the OutputArea meaning the layout doesn't apply to the OutputArea as expected. Here we unsuccessfully invert the widgets.

After

Now the layout applies as expected to the OutputArea. Here the widgets are inverted as directed.

Select

The widget-select css class height is changed from inherit to 100% enabling the selection field to span vertically by default.

Before

After

[github-actions]

👈 Launch a binder notebook on branch fleming79/ipywidgets/OutputWidget-enhancements