Summary:
`scrollTo` used there caused the window to scroll to the most left when a user was inspecting an element which horizontal scroll wasn't in the most left position.
This diff removes the horizontal constrain and only scroll vertically.
Reviewed By: mweststrate
Differential Revision: D23284227
fbshipit-source-id: 7c19cac7496927c631572e222cb1d635dd1f8ea4