Fixes missing _html_tesm fields and <notes>

[gwiedeman]

Now displays component fields correctly, which Closes #1451, Closes #1450, and Closes #1459. They all now display at

• http://localhost:3000/catalog/pc0170-xml_aspace_ref5_edi
• http://localhost:3000/catalog/umich-bhl-851981_aspace_7a47b946a5107eb56d93ef0cd069d568.
• http://localhost:3000/catalog/pc0170-xml_aspace_6a6648be46e57d220d1f4f6d07316570

This also handles many <note> elements both inside and and outside of collection and component <did> elements, which Closes #1467

[seanaery]

Just need a quick fix here re: the did/note element... rather than add it individually as did_note_ssm, it would be best to add it to the DID_SEARCHABLE_NOTES array here and here.

That way it would get collected in note_html_tesm field regardless of whether it was situated in the did. It'd also get the to_text: false rule which would preserve any XML tags nested within the note for further processing through the render_html_tags helper. E.g., if the note really did say to contact us and provided an extref link to do that, the link would work.

Then you also wouldn't have to add a did_note field to config.add_background_field & config.add_component_field, you'd already be covered by note.

[gwiedeman]

Ah, yes I didn't think of that. The component did/note was is already broken out, I guess to compartmentalize if you have one note in the <did> and one outside it, but I don't know of a use case where that;s meaningful, so I think I agree to just add them to the same field.