Improved graphs chapter

[Marc-Andre-Rivet]

Subset taken from https://github.com/plotly/dash-docs/issues/740:

• [ ] document extendData and restyleData (#488)
• [ ] example using uirevision (https://community.plotly.com/t/preserving-ui-state-like-zoom-in-dcc-graph-with-uirevision-with-dash/15793/71)
• [ ] document transitions (see #660 )
• [ ] document graph responsiveness (see #720)
• [ ] explain how plotly.js is used under the hood and how to check the plotly.js version and updated it if necessary (#723 )
• [ ] Describe exactly which properties and interactions (e.g. clicking on legends, zooming in or out, clicking on buttons in the modebar, clicking on points) are available in restyleData vs relayoutData etc.