liquid_feedback_frontend: env/ui/icon.lua annotate

liquid_feedback_frontend

Fix error when creating new user

rev	line source
bsw@1649	1 function ui.icon(icon, class, id)
bsw@1649	2 class = class and "icon-" .. class .. " " or ""
bsw@1649	3 class = class .. "material-icons"
bsw@1649	4 ui.tag{ tag = "i", attr = { id = id, class = class }, content = icon }
bsw@1649	5 end