Like the other global assumptions, add a placeholder text (when there is no selection) to the CO2-eq assumption. Suggested placehoder text : "Optimize cost" <img width="340" alt="image" src="https://github.com/ligoj/plugin-prov/assets/579170/5ea7ccaa-af4b-45a1-8909-86a33239a77f">
Like the other global assumptions, add a placeholder text (when there is no selection) to the CO2-eq assumption.
Suggested placehoder text : "Optimize cost"