Aztec: Post scrolls to bottom when selecting an image

[frosty]

Expected behavior

When there are multiple images in a post, and I tap on an image to edit its settings, I expect the editor's scroll position to remain the same.

Actual behavior

The editor's scroll position jumps to the bottom of the post. It seems like tapping an image perhaps moves the insertion caret to the bottom of the post, hence the scroll.

Steps to reproduce the behavior

1. Open Aztec
2. Add more than one image to the post
3. Tap on the topmost image to view its details
4. You will be scrolled to the bottom of the post
5. You must then scroll back up to tap on the image again to then edit the image details

Tested on iPhone 7, iOS 10.3.3, WPiOS 8.4.0.20170905