Strikes me that if this means adding an extra mode to "repeat" settings, it might break a lot of themes.
Perhaps it would make sense for this to be the standard behavior of repeat 1? Is there any benefit to the existing behavior, that I'm not thinking of? (It seems sort of technically logical that when on repeat-1, pressing fwd or bck would take you back to the start of that 1 track, but as logical as it is, it doesn't seem as if it serves any useful purpose to have it work like that)