New custom fields in Insight diagrams

In the insight views it is possible to show various diagrams. For the diagrams three dataseries are avaiable to show: total cost, cost with adds, sales price. We should add all custom fields of the new type (calculated based on quantity) so that they could be shown. That would enable showing e.g. CO2 in the diagrams.
Acceptance criteria:
The new custom fields are available to select in the Show Diagram dropdown: