Add model performance summary plot

Goal: To have a plot+table that summarizes the performance (both forward as well as inverse model performance) Motivation: At the moment for high-dimensional (even for semi-high-dimensional) problems one has to go through a large number of plots to get a full overview of the performance.

Tasks:

• Implement summary table for all the performances
• Implement performance summary plot

We thought of something like the plot below: However, this was a quick fix. So we think there are better options for it. And are happy of improvements or other other ideas for the plot.