Error when opening a recovery doc from another tab after a save #214
Description
Repro steps:
Create a student doc with anything in it. Let it save into local storage (just wait a few seconds)
Navigate back to the mode selector page, open that page in 2 tabs.
In one tab, open your doc from the recovered assignments list.
Make an edit on the doc and let it save back the new version in local storage.
Go to the other tab (without refreshing), try opening the same doc and you should get a JSON deserialization error in the console.