Fix: Spawned downloads are not queued.
Fix: Spawned downloads are not queued.

Spawned downloads were not automatically reordered relatively to the
parent download, and also not queued for download.

Bug introduced with 940afc864c.

downthemall/anticontainer,downthemall/anticontainer,marianocarrazana/anticontainer,marianocarrazana/anticontainer,marianocarrazana/anticontainer,downthemall/anticontainer