When a DiscListEntry is deleted, the track list shrinks by 1. Once the track list becomes small enough, the scroll bar is hidden and the track list expands to fill the window. This can cause DeleteButtons to slide out from underneath the mouse cursor and get stuck in a hovered state.

Find a way to clear the hovered state immediately when the mouse leaves the DeleteButton, instead of waiting for it to leave the DiscListEntry (03a4e0d).