Discover: Provide a green line for histogram periods with "too few" (relative to other periods) documents to show a visible bar

[ppf2]

Kibana version: 7.7.1

When querying for a long time range with great variations in document counts, the Discover histogram can be misleading because it would appear that there's no data for part of the range, but in fact there is actually data (e.g., May 7-21)

Certainly, when you start zooming in, you will see that there is actually data in that range:

While the user can mouseover and see counts ...

... it can be a nice feature for the histogram to show at least a green horizontal line for this range that has data so the end user can immediately see that they are not actually missing data for those periods (and does not require having to manually mouseover the range).

This is helpful especially if you put the Kibana dashboard on a tv screen in an operations center, etc..

[markov00]

@kertal It can be easily solved using the following prop: minBarHeight into the <BarSeries> or HistogramBarSeries this will keep rendering the bars with the minimum height in px specified in that prop.
See https://elastic.github.io/elastic-charts/?path=/story/bar-chart--min-height for an example