Comment 4 for bug 65585

I didn't know it was configurable actually...
The option "Remove when conversation window gains focus" was unchecked. I checked it and it worked as expected: it stopped blinking when the window came in focus.

I don't know if it's the same for lexual, but if it is, I would suggest that it be checked by default as it is more natural to me that if the window gets the focus it stops blinking. It is the default behavior of most applications I used in the past, and also if the windows gets focus, most likely you read the message so there no need to keep blinking, right?