Photo Editor for Profile Photos needs improvement

For me, the cropping in the Photo Editor doesn't work very well. All I can do is move the fixed size cropping square up and down (for portrait photos).

Could you please try to improve this so I can zoom in/out or move the cropping square both side to side and up and down?

I like how Twitter does this with a slider to zoom and a photo drag to move the image inside a fixed cropping square.