Code review comment for lp:~linaro-infrastructure/launchpad/workitems-widget

Matsubara is now hammering this to see if he finds any bugs we haven't found yet. We also need to work out a plan to notify people about the BPs we won't be able to migrate and an announcement for the UI changes. Once that's done we can land this.

In the meantime I'm merging lp:~salgado/launchpad/workitems-widget-help-popup in here because here's where it belongs (and it has been approved already)