Old Screenshot
The above image is a screenshot of an old PM. While some icons like bubble pop or heartpop are missing and the image is half cut, the correct order should be "star.gif - thinking.gif - bubblepop.png - heart.gif - heartpop.gif - fire.gif - radioactive.gif - question.gif - alert.gif - info.gif - osu.gif - taiko.gif - ctb.gif - mania.gif".
Suggesting to swap icon orders to match the legacy osu forum.