Add a button in-app to rotate images embedded in posts

You know it, I know it, everyone knows it. Pictures get shared facing the wrong direction all the time, and with these images it is quite literally a pain in the neck to figure out what you’re looking at. Simple idea: when you click on an embedded image to view the larger version of it, have a few buttons become available to flip the image horizontally, flip it vertically, or rotate the image by 90° per button press. It’d save people a lot of headaches (or rather neck-aches) and a lot of image-sharers a bit of embrassment.