[Geary] Message stuck in outbox

[Alex Henrie <alexhenrie24 gmail com>]

Today I sent an email from Geary, and I disconnected from the network
right after it was sent. Now I can't get the message out of my outbox.
There is a pink box above the message that says "This message was sent
successfully, but could not be saved to Sent Mail."

How do I recover from this situation? The message can be moved to Sent
Mail now, but I can't find a button that will do that.

-Alex