[Lens] Filtering a breakdown value resets colors

[ghudgins]

Describe the feature:
This is a feature-ish bug. Breaks a sort of "object permanence" expectation with the user

• Create a bar chart with a break down
• Left click and filter to the value of the break down (in the below screenshot, the user selects "UI" as the filter)
  

Expected: only see bars of the color you selected (so, for the screenshot, this would be red)

Actual: ramp resets and you always get the first color (green)

Describe a specific use case for the feature:
Users, when picking values to filter down, expect they're looking at a subdivision of the previous chart and not a new chart. Where possible, preserve styling // object permanence

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[wylieconlon]

I think this is a deceptively complex set of interactions to think through, and we've previously had issues with this in the Visualize app. We could take advantage of the Color Service to handle the name:color assignment in Lens, but probably need to define a trigger that would reset the color assignment. For example, we might want to reset the color assignment every time you add/remove/update the query that powers a dimension, or every time you switch charts. By tying the color service to datasource updates, but not external changes, we might get closer to what users expect.

[ghudgins]

a +1 quote:

For example bar chart with a value of “green” with a color assignment of green, but when the dashboard is filtered for a “yellow” value, the yellow colored bars change to a color of green.

[stratoula]

This will be solved by the color by terms project. #101942