Don't complete futures for queueitems. which have already been completed. Fixes a bug where random stash tabs weren't loading.

Signed-off-by: Ben Jackman <ben@jackman.biz>
Fixed bugs that were causing passive skill trees not to load in PoeBuilder.

Signed-off-by: Ben Jackman <ben@jackman.biz>
0.2.1.22

Signed-off-by: Ben Jackman <ben@jackman.biz>