Visualisation of KPI plots (raw and effective fit)

I think the new plots only show the raw fit, not the effective fit slope anymore. Compare

• KPI Result is the same, but the plot is different:
• With @aspi.hzb it was agreed upon earlier (see !90 (merged)), that the fat green line (effective slope) is the one to show, not the raw fit (grey dotted line = orange dotted line in new_script)