As a user, I can edit a story's point estimate, without it not updating the UI

[51ngul4r1ty]

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[51ngul4r1ty]

The bug seemed simple to resolve, but after digging into it some more it happens because:

1. Editing the story point estimate for product backlog item doesn't take into that there are "parts" associated with the item. Instead, it was editing the estimate field which was not the value show to the user, which was instead storyEstimate. So, the basic fix means updating storyEstimate instead of estimate, but there's more (see below).
2. If there are multiple parts, when you edit the product backlog item you're actually editing multiple parts. So the UI needs to take that into account and update those parts. If there is a single part, once again it needs to update the "part" as well as the backlog item itself. The rules are now defined in the "Description" field.