Remember selected e-mail (item) when changing folders

Often you need to switch back and forth between (IMAP) folders, and it would be great if eM Client remembered which e-mail you were reading before you left the folder. (So that it was highlighted again when you came back to the folder later.)

Ideally, this should be an option for the user to select, because not all users want it this way, but for those who do, it can be very important.

It seems to me that this function is actually implemented in version 5, which is great.