Cursor synchronisation when multiple charts are displayed

[thomasdanan]

Component:

'chart'

Why this is needed:

When looking at multiple charts at the same time, it could be interesting to have a synchronized cursor in all charts in order to ease the correlation between charts. More or less like what Grafana is doing in a Dashboard containing multiple charts.

What should be done:

We need to have a way to synchronize charts cursor so that when the user change cursor position in one chart, other charts cursor move to the same position

Implementation proposal (strongly recommended):

Test plan:

[Cuervino]

1. A prerequisite is that the charts share the same time x-axis.
2. An example in Grafana: