Focus body in message window when caret mode is enabled
Using the Orca screen reader with Evolution's caret mode enabled, when opening a message, nothing appears to be focused. When attempting to read the message using the arrows, nothing is spoken. The expected behavior is for the message body to get focus, so that caret mode moves correctly through the body of the message by default. A good addition to this would be for the F6 keyboard shortcut, which in the mail window cycles between the message list and the folder tree, and also cycles to the preview when it is enabled, to also cycle between the headers, attachments and body while a message window is open.