Previous refactoring renamed the "data-type" attribute of widget markup containers to "data-widget", breaking the "unique" validator as it relies on it to lookup options. Fixes: #3341 Fixes: 13e9e3e9e ("treewide: fix "Unhandled token" errors with Lua CBI maps") Signed-off-by: Jo-Philipp Wich <jo@mein.io>