I tried editing the discord speed dial tile, but it messed up the icon and now I can't get it back. How can I fix this?

If it can't be fixed, I think a useful feature would be for one of the available images on the speed dial bookmarks to be generated based on the icon for the tab (the picture before the name at the top), so that not only would my issue automatically be fixed, but icons for other sites could look much nicer and fit in better as well.