Grouped Bar charts for non-aggregatable data

[adieyal]

When a group/variable is set to aggregate=False we should not show the sum of the indicators but rather create a grouped bar chart.

For example:
We have the age group on YE. but they include overlapping age ranges, so we cannot aggregate on this group.
Therefore we must should show a grouped bar chart instead.

0.14

https://trello.com/c/Gga9fD38/722-grouped-bar-charts-for-non-aggregatable-data

[milafrerichs]

How the Vega json should look like:

Vega Editor