Console errors when clicking on the "Edit Page" button to turn FEE on - commit 0569644
Floating toolbar doesn't show up - commit cc94a5c (hack fix; please fix properly!)
Clicking on the 'remove' button multiple times in the image floating toolbar removes parent elements - see #266 (basically merged my other branch to this PR)
These are my compiled fixes for WP 4.3.1
Issues:
Cherry-pick whatever commits you need.
Let me know if you have any questions!