It's better to have a single function loading tracks and adding them to
the history queue.
Fixes#2: Initial track not added to history
Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>
The GUI needed an extra function to do this manually, which means it's
something that core should do instead.
Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>