@depmco Not intuitive, but if I gather streams into a playlist -- then "favorite" that playlist (double click star) -- close the playlist -- and reopen from the list of favorites in the Playlists Sidebar -- Then, and only then, can I right click on a stream and "Edit tag 'Title' ". In my Strawberry, the text I type is annoyingly superimposed in the edit field, but it does work.
Prior to discovering this, I went through a tedious process of creating a playlist of streams, saving it and then editing all the titles of the saved playlist in a text editor. The method above seemed easier to explain.
Perhaps Jonas does not want to introduce "feature creep" in Strawberry, but the stream function is pretty spartan and could use a little love, IMHO.