Dynamic heatmap legend in Natural Ventilation tab

[t-kramer]

In the current version, colors and the legend for the Heatmap graph in the Natural Ventilation tab are dynamically adjusted to the temperature and time filters at the top of the section. This creates a problem if the users wants to compare charts with different active filters, because the legend adjusts automatically.

Should we enforce that the colorbar range is fixed to the max and min temperature for that location (including all the data)?

This issue was created based on an inital discussion topic broad up by @FedericoTartarini and was turned into an issue

[t-kramer]

Examples from previous discussion: