Should _plot_and_save_spatial_plot be made more generic, and as such renamed?

[daflack]

Originally _plot_and_save_spatial_plot was intended for 2D maps. With the introduction of the transects (which are also a 2D field, but arguably not a spatial plot) the role of _plot_and_save_spatial_plot was expanded. There are several other plots which required 2D plotting between two fields: Hovmoller diagrams, CFADs (#1010), 2D histograms (#1011), etc. It makes sense to reuse the capability we have. The questions then become

• should we make the function more generic, rather than just "spatial"?
• will the function become unwieldy with several if statements (some of which show only partial test coverage)?
• should we rename the function/and any others for clarity for developers?