Update of scenario_analyzer: Last plot (plot_balance_per_type)

[TUM-Doepfert]

Is your implementation related to a bug report or feature request? Please describe or link here.
The last plot of the analyzer is not adequate for analysis yet as due to its computation it produces less than ideal results.

Describe the designed solution
Currently, the idea is to split the costs and revenue bars instead of implementing just one bar. To be discussed.

Describe alternatives you've considered
No alternatives considered yet.

Implementation details
To be edited:

• scenario_analyzer.py