Show conversations in viewing pane all collapsed by default

When single-clicking a conversation in the inbox, the message shows in the preview pane. But when thre have been multiple replies, it is confusing to know which is the latest, because all of them are expanded by default. How do I make the previews show with all messages collapsed by default? Or better yet, only the most recent message (i.e. the message you actually clicked on in the inbox) expanded?

Just scroll up on the message preview. The multiple replies will be listed above your message and they are collapsed and listed chronologically with the latest at the bottom.