Ctrl-z after rename seems to break the index in OZ

[kanej]

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This is feedback from @alcuadrado raised during manual testing in the openzeppelin repo.

I renamed a contract that is heavily used in OZ, it worked like a charm, I got really excited, undid the rename (cmd-z), tried to record it, and it didn't work

The contract renamed was context.

https://user-images.githubusercontent.com/24030/157411103-465e62cc-121c-4403-b0c4-ab6ef4295d96.mov

The files that should have been edited where not opened automatically (if they were not already open).