Please test in more than one browser and mention in a comment which ones you've used.

1. Log in as a user and open the messaging drawer.
2. Open your personal space by clicking on your name or search and find a user to write a  message to.
3. Open the emoji picker by clicking on the smiley face next to the message box.
4. Try everything you can find in the emoji picker, such as different categories, recent emojis and the search.
5. Check that everything you find works as expected.
6. Check that clicking anywhere outside of the emoji picker closes it (if it's open).
7. Check that hovering over an emoji shows a preview and the short name in the footer.
8. Try emoji auto complete by typing a colon followed by the first few letters of the short name e.g. :smi.
9. Check that the suggestion list is updated with new matches.
10. Check that you can use the left/right arrow keys to navigate through the list of suggestions and use the escape key to close the list of suggestions.