Current state of progress-board

[SimonBlanke]

After coming back to this project after some time I feel, the source-code is still in an experimental phase:

• Most of the code-base is not tested
• The installation via pip seems unreliable. Conda is needed for reliable usage.

I will look into a better way to run the progress-board in parallel to the optimization run and how to test this GUI via selenium. I am also thinking of using plotly-dash instead of panel in the future, because panel seems very tied to conda.