Resizing an aligned image results in strange behaviour

[johnbillion]

Issue Overview

Using the resize handles on an image which is left, centre, or right aligned results in strange behaviour until the mouse cursor is release.

Steps to Reproduce (for bugs)

1. Insert an image block, place an image in it, and align it using one of the alignment buttons in the toolbar.
2. Insert a paragraph block after the image block and place some text in it.
3. Resize the image using one of the corner handles.

Expected Behavior

The image should resize according to its alignment, and the text that flows around it should reflow immediately.

Current Behavior

The image behaves strangely. The text that follows it only reflows once the mouse cursor is released.

Possible Solution

Immediately reflowing text could have performance issues, but the image itself should remain correctly aligned during the resizing.

Screenshots / Video

Video: https://www.dropbox.com/s/j7m51h5kglm43dx/resize.mp4?dl=0

[johnbillion]

Whoops. Duplicate of #3944.