Is your feature request related to a problem? Please describe.
After #258 we moved away from some of the styling types we used before. That move was driven by the fact that some stiles where optional in the Theme but not optional in other computations.

Describe the solution you'd like
Keep the styles types

Describe alternatives you've considered
#258 (comment)

Additional context
n/a

Kibana Cross Issues
n/a

Checklist

• this request is checked against already exist requests
• every related Kibana issue is listed under Kibana Cross Issues list
• kibana cross issue tag is associated to the issue if any kibana cross issue is present