@utzer I have fixed versions of smileybutton and smiley_pack addons on my GitLab. I submitted the smileybutton fix and it was merged, but apparently into dev branch not stable. The updated smiley_pack is optional.
gitlab.com/users/randompenguin…
A new "media" embed button was added to the compose window. All of the buttons on both the compose and comment tools were given a new style of "btn-default" which gave them the gray background (not sure what the point of that was IMO "btn" should be the base/default). It looks like you're just using regular Frio, but for Bookface scheme I've fixed the button appearance in version 2.1.4.