For SRKW map points, make date color bar span Jan-Dec

[scottveirs]

Problem statement:

When comparing SRKW point observations between pods, I found it confusing to have an inconsistent range of colors used to convey the time of year of the observation. For example, in trying to discern the first, second, and third visits of SRKWs to Puget Sound's main basin in 2023, I noticed that for K and L pod the color bar spanned January through October...

...while for J pod it spanned the whole year -- January through November:

Proposed solution:

Rather than adjusting the scale bar based on the temporal distribution of the observations in a requested data subset, make the range of dates (i.e. months) be consistently the full year -- from January through December -- like this:

[scottveirs]

@liu-zoe This issue isn't high priority IMHO, but I'll use it to test tagging you (to see if you get a notification via the salish-sea Github organization).

[liu-zoe]

Yep, I'm tagged! Thanks for testing :)