[feature] best performing model should be highlighted

[ChristianSch]

If we have a number of models which share some metrics, we should highlight the best and worst performing models. The maximum value of a metric should be marked with some color, and the minimum value as well. The colors however should not be red and green, as errors ought to be minimized, and scores maximized, and we have no way to tell (other than trying to be smart and parsing some scores and errors, which isn't really a good approach). Maybe blue and orange.

• add legend above the models (which are only displayed if we have more than one model) which a re hyperlinked to the respective value (max and min value via #min-val or #max-val)
• detect max and min of a value
  • mark row with color and underline the value
  • create an anchor to allow jumping to the row from the legend
• introduce help button that displays a short explanation of the difference between error and score.

[ChristianSch]

Maybe the indicator should be icons or ^max or something instead of colors