PIMS-1984: Fiscal year only takes year values.

[GrahamS-Quartech]

🎯 Summary

PIMS-1984

Just adding a numeric prop to the text field could have solved this bug but it seemed like it may be better to just constrain this input a lot more in general. After all, there's really only two options that may be valid, max. So with that in mind I've tried to make this a single select style input instead. I also made it so that you can't add more rows once you've added current year and previous year, since past that point nothing else is valid.

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[dbarkowsky]

This is working well for me.
The maxRows is sometimes 1. I think that will be ok, but noting that we could up it if needed.