fixing up an issue where the radar crashes if an outer layer is filled i...

[hasTimc]

...n without all inner layers filled in. i.e. if you have an item in hold and 3 in adopt with nothing in trial or assess the picture will not display without this fix.

[NetAppBlueDevil]

I think this solves the same problem I was seeing. I did slightly differently since I didn't understand if the key thing was important. I just got a dataIndex (below) to use for the points, but I think it solves the same issue the for loop setup in this change addresses

My tweak for (var stageIdx in _(itemsByStage).keys()) { dataIndex = _(itemsByStage).keys()[stageIdx]