Some threads got locked today for being duplicate suggestions/due to the new masterthread, and that's perfectly fine! But it made me realize that there's no indication that a thread has been locked from the list of threads in a forum, similar to how sticky threads are indicated with the green Sticky thread. It would be helpful to have a similar indication for locked threads, whether it's the same kind of green text or an icon, so we know immediately that we can't post on something.