Add edit/command mode indicator.
Adding PDFFormatter and kernel side handling of PDF display data.
Adding support for multiple figure formats in InlineBackend.
Making figure_format config=True.
Adding top level IPython.display.select_matplotlib_formats.
Docstring improvement.
Refining the matplotlib APIs in IPython.display.
Adding basic append_pdf in OutputArea.
Spinning sun + nothing for command mode.
Add example of using annotations in interact

The reason for using annotations is to use the syntax - our decorator
has no advantages over passing kwargs to interact[ive]. So this adds a
proper demo, with a 'Python 3 only' subheading.
Add q to toggle the pager.
Just close the pager with q, not toggle.
Adding line about setting quality in config.
Fixing docstring.
To the most conservative choice.
Merge pull request #5065 from takluyver/interact-annotations-example

Add example of using annotations in interact
Merge pull request #5070 from minrk/remove-display-flex

fix flex: auto
Merge pull request #5052 from ellisonbg/pager-q

Add q to toggle the pager.
Merge pull request #5061 from minrk/execute-button

make execute button in menu bar match shift-enter
Merge pull request #5048 from ellisonbg/modal-indicator

Add edit/command mode indicator