Chart Hover tooltip values are rounded at 3rd decimal. Needs more decimals when necessary.

[MLAuger]

I noticed that the geochart hovertips are rounded to the third decimal.

I'm currently working on a project that have low values. This limitation results in points located at different levels on the chart having the same value showed in the hovertip, and any value below 0.001 is displayed as 0.

Examples: