bsw@1649: function ui.icon(icon, class, id)
bsw@1649:   class = class and "icon-" .. class .. " " or ""
bsw@1649:   class = class .. "material-icons"
bsw@1649:   ui.tag{ tag = "i", attr = { id = id, class = class }, content = icon }
bsw@1649: end