When a notification comes in with a revert, check the user's talk page messages to see if any address that revert.

(Note: This is only performant if we cache user talk page messages.)

For a revert notification:

1. Poll for latest user talk page messages, for the app's user.
2. Search the local user talk messages for the given revert ID in the free form text.
3. If found, that’s the relevant talk page message! If not, we'll treat it as if there is *not* a relevant user talk page message.