Add-on Recently used Smilies always visible when writing a post

[xffutureuser]

I would like to have Recently used Smilies always visible when writing a post. Because when I click on the Smilies icon, the popup window with the smilies is loading too slowly. Something like this:

I don't know if there is such add-on or if it is part of XF.
If not, I would like to buy it as an add-on for 2.1
Thanks.