Here's what it looks like if we remove `SIDEBAR_SOURCE` from `localUnshimTypes` and shim the `SIDEBAR_SOURCE` message on the keyserver side:
{F1697637}
Here's what this solution looks like, where we remove the shimming logic and send a `SIDEBAR_SOURCE` without a `sourceMessage` to the client:
{F1697639}
Note that I checked it as a sender and recipient, and it looked the same on both. Also tried logging out and then back in as the sender, and still saw the same thing.