Check In All can cause errors on large numbers of documents

[blms]

Should be split into multiple calls. Should use a hard limit on total resources, maybe 100, to determine how many docs make it into each request.

---

testing notes

On the latest dev build (1.3.0-dev.4)

• Add a bunch of new TEI documents, maybe 15-20
• Check them in normally. When you click "check in" in the modal, the table should disappear, and you should see the table start to populate again with checked-in items as more and more items are checked in
• It should give you a count at the top for how many documents are checked in out of the total
• All check ins should complete successfully
• Check them back out. Once they're all checked out, return to the local page
• Try the same with Check In All. There will be no table in this window, but you should see the count checked in / total update as things are checked in
• The check in should complete successfully