Doc: Examples for Disabling continuous updates

[sciencecw]

Problem

https://ipywidgets.readthedocs.io/en/latest/examples/Using%20Interact.html#disabling-continuous-updates

In the examples, the slidebars are movable and the buttons clickable, but the output is static and does not illustrate expected behavior

Suggested Improvement

Either the example is changed to a fully interactive one, or the examples should be gifs demonstrating the lagging behavior.