Img meta data - refined specs (animation)

[meremagee]

the focus is being reset upon tapping an image to bring up "edit" overlay & animation is janky: https://cloudup.com/ikMZ1F2LFS0

per thianh's initial mock https://cloudup.com/cFvBfPhdY3q

• maintain focus on tap (don't scroll)
• add fade/unfade animation upon focus/unfocus
• slide in settings from right

cc @aerych