Multiple EOV plots

[jaseeverett]

Add the ability for the pr_plot_EOVs to take a vector of parameters and return a patchwork of all the requested EOVs.

At present the function is called for each EOV individually. What are the implications of this from the BOO side. The function will continue to run every time a new parameter is checked. Perhaps if we save each plot in a named slot, it will only update when a new name is selected.