[ML] Allow clicking on influencer directly in anomaly chart

[elasticmachine]

Original comment by @ppf2:

Currently, if you click on an influencer in the table, it can end up showing multiple influencers in the anomaly chart (including what's following it), not just for the period that you clicked on.

It does mark the period that you clicked on with a gray background. And the actual table below the chart will only show the threshold data points for that gray period.

It will be nice if the end user can directly click on the "other" influencers that are not part of the selected period (but showing up in the chart), eg. if they click on the top influencers in the chart showing up in the late March period, it will cause the chart to shift to that period and mark it gray, with the data points below the chart updated accordingly.

Certainly, you can do this today by clicking on the next red band in the influence table above the chart, but it can be more intuitive if the users can interact directly with the chart.