How to Make Sparrow Put the Oldest Message on Top in Conversations

First, here's an egg of silvery-white color. It is made of Aether.
Then comes Chronos. He has three heads: a bull's, a lion's and man's.
Finally, there's chaos. The gaping void is formless. Now, Chronos seems in about the right place. Chaos and the world egg seem out of their chronological order, though — like emails might in Sparrow:
›› Wish Sparrow would not put the most recent message in a thread at the top (so you have to start reading at the bottom)? Here's how to set up Sparrow to sort conversations chronologically with the latest message at the bottom (so you can start reading at the top).