commonElements (one of the screen stylesheets for both Monobook and Vector) has:
a:hover, a:focus { text-decoration: underline; }
Do you think it makes sense to turn this underline off for all a.mw-ui-buttons (Agora buttons using an a element)?
We're doing this for GuidedTour buttons (e.g. https://commons.wikimedia.org/wiki/File:Guiders-Agorastyle.png), but I thought it might be of broader use.
Thanks,
Matt Flaschen