Don't automatically select 1st newly arrived message
When having a zero Inbox with the focus/selection on the Inbox in the Folder list pane (most left pane in the three pane view), if a new message arrives, the focus automatically moves from the Folder list pane to the Conversation list pane, the newly arrived message of the conversation is automatically selected, marked as read and its content displayed in the Message area pane. If more new messages arrive, the 1st message/conversation received stays selected. It does not matter if Geary is the foreground application or in the background or even minimized.
This behavior is not desirable. It is misleading. For example, if I leave Geary running on my home desktop and then use another mail client on a different device like on my phone, it shows the 1st arrived message as read even though I never read it.
Geary instead should leave the focus on Inbox in the Folder list pane and leave it up to the user to select a conversation. That is the behavior other mail clients implement. That also means, that as long as the user has not selected a conversation, that the message area remains blank. Currently, the text displayed in the message area if there are no conversations in the selected folder reads: No conversations found \This folder does not contain any conversations. That messaging would need to be adjusted for the case that there are messages in the currently selected folder (which would be the Inbox in this case) to something like: No message selected.
Environment
Geary 0.12.4
The following Preferences are enabled:
Automatically select next message
Display conversation preview
Use three pane view
Always watch for new mail