Hi, I installed v40.0 and when I go to Preferences, there is no “Use three pane view”. This makes it rather tedious to read messages – I click on a message in the message list and there is a visual wipe and the message is displayed. But no way to go to the next or prev. message. I have to click the < arrow in upper-left corner to go back to message list, then select a new message. I don’t see a keyboard shortcut to go to next/previous message.
I installed via Flatpak on Ubuntu 20.04.2 LTS (Lubuntu).