Exclude low-volume data from usecounter charts by default #5240
Description
Is your feature request related to a problem? Please describe.
The usecounter values for features that have only deployed on the canary or beta channels are hard to compare to the same feature after it is on the stable channel. Since we plot both in the same graph, the scale of one part of the chart can make it hard to see what is happening in another part. In other words, sometimes a spike while in beta makes real data look tiny.
Describe the solution you'd like
The datapoints that have low_volume == True are probably not useful to most users, so they should not be displayed by default. Feature owners may be interested in these numbers early in the feature's development, so there should be an option to include them if desired, or maybe switch to them alone to avoid competition for the graph scale again.
We have not been storing the low_volume boolean in our NDB database, but we could backfill that data from our data source.