Source changes for image #2591150

Image		Source	Action	Timestamp	User
2591150		https://boards.4channel.org/mlp/thread/36830333#p36838971	Removed	3 years ago	Background Pony #C990
2591150		https://twitter.com/ShydaleArt/status/1381025737868730369	Added	3 years ago	TwilyIsBestPone