Display power production and power consumption at each voltage level node

[So-Fras]

Describe the current behavior

In network-area diagrams, it is not currently possible to see which voltage level produces or consumes power.

Describe the expected behavior

The active power produced and consumed at each voltage level node should be displayed:

• in a first attempt, as text in the voltage level text box for example
• afterwards along 2 small icons (one for production, one for consumption):
  

Displaying those pieces of information should be an option.

Describe the motivation

It would help users see at once which node is more of a consumer or a producer.

Extra Information

No response