Song display in window and Dock menu in Stop status

The behavior in Cog is that once you press Stop, if you press Play, it'll play whatever song is selected in the playlist.
And if nothing is selected in the playlist, it'll play the first song.
(And of course, if there is no song, it just won't do anything.)

So basically, when you press Stop, the song you were playing isn't really "selected" anymore.

Currently, when you press Stop, the last song played is still displayed (title and artist) at the top of the window and also in the Dock menu.
Since it isn't really the selected one anymore, this is a bit misleading.

I suggest that when you press Stop, both the song display in the window and Dock menu should go back to the state they had when you first start Cog.

small, related side issue:
When you first start Cog, the Dock menu reads:
Untitled
Untitled
Perhaps they should just be 2 blank entries?