Displaying Score Estimation Plot from Saved Analysis (KataGo)

[bdrose]

When opening a file containing analysis by Katago done in Lizzie the score estimation is not plotted along with the winrate plot. This can be fixed by loading the Katago engine, the saved score is then recognized and plotted from the file. Perhaps when opening a file the presence of the score could be checked for to plot score without having to load the engine.

[kaorahi]

It is troublesome in general to load a recorded analysis by different engine and weights. Furthermore, this issue is not so straightforward due to #810 unfortunately. Lizzie does not distinguish "no score data" and "score = 0.0" internally.