Add fixed scaling for ATHD_S

[pirmink]

No description provided.

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Compare station_scores_ATHD_S with fixed scale to operational station_scores_ATHD_S. Click "Next Type" on both pages to compare other plot types.

[leuty]

Cool. The station scores are much more usable now.

The scale for NOBS still looks a bit off for station scores. However, I rarely look at them, so feel free to ignore.

Nitpick: I wondered if the range for MAE and RSME of time score needs to be 80. Could 60 be enough? After all, the scale will be extended automatically as a fallback.

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@leuty Plot ranges are always a tradeoff between comparability, for which they should be large enough so that they rarely need to be extended, and good visibility of the relevant values, for which they should be as small as possible. In this case however a reduction of the range as suggested seem warranted.