1.3.1: ql-embed-selected isn't removed when the keyboard is used to change cursor position

[eamodio]

Steps for Reproduction

1. Visit the playground on quill.com
2. Add some text, press enter, add an image
3. Click on the image
4. Use the arrow keys to change cursor position (which unselects the image as expected)
5. 🐛 Observe that while the selection is removed, the ql-embed-selected class is left behind -- this doesn't happen if you change the cursor position with the mouse

Expected behavior:

ql-embed-selected is removed

Actual behavior:

ql-embed-selected is left behind

Platforms:

Chrome: Version 60.0.3112.78 (Official Build) (64-bit)
Windows 10 Creators Update

Version:

1.3.1