Fix 3.8.0 responsive resizing behavior #1525
Merged
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Closes #1524
This PR fixes some regressions in responsive plot resizing that were introduced in 3.8.0.
I also tracked down a JavaScript error message that was being raised on resize. This led to figuring out how to explicitly cleanup the plotly graph_div elements when they are no longer visible in the notebook (output cell cleared or cell deleted). This may potentially reduce memory usage during long sessions where plots are repeatedly created and destroyed.
Finally, I also worked out how to make the new
iframe
renderer resize responsively as well.