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This simplifies how Arclight handles
<unitdate>s for both collections and components per the approach in #1028 comments.Arclight now stores a list of unitdates in
unitdates_ssmand a corresponding list of type labels inunitdates_labels_ssm. Labels only display for@type="bulk". The order of<unitdate>elements in the EAD is preserved.This does simply how Arclight handles unitdates and more just displays what's in the EAD where before it had some more logic. I think this is generally a good approach, and covers the all the use cases I can think of, but I'm not totally sure it replicates existing functionality 100%. There is some logic here in particular that I wasn't sure what it was doing.