Ability to remove the added images

[rktfier]

Hello there, while it is good to be able to add as much stuff as we want to the tier list, sometimes it's possible to add duplicates or the wrong content. For people who add to the list piece by piece and rate in order to get a baseline this can be hard as you have no choice but to start over. It would be pretty epic to have the ability to delete specific images.

[silverweed]

Good idea, I added it in d5ed867