Add an event for panning and zooming that show live details as the range changes #2082
Description
It would be useful to have an event that is fired any time the range of a chart changes (not just after the pan or zoom is complete). This event could be used to make a second chart scroll or zoom with a first chart.
I want to use it to make a chart with the x-axis scrollable on my page over my other, quite large chart, that has many subplots. I could also see it being useful for things like a dashboard where charts are separated to a point where they cannot just be subplots, but you want live updates to the charts as other charts are changing.