Partition deletion

[tsunulukai]

Ref: jcorporation/myMPD#440 (comment)

When trying to delete a partition, mpd won't do it unless it's been emptied of outputs.

delpartition Test
ACK [5@0] {delpartition} partition still has outputs

Wouldn't it be more intuitive / practical from a UX standpoint to have mpd automatically move those outputs to the default partition instead of displaying the error message ?