HSC-1032 - Allow user to cancel VCS OAuth step in add-app #688
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In the select source step, when the user clicks next, we open a new tab to do the OAuth flow. However, something might go wrong where we aren't able to detect the issue in the proxy (callback is not called). For example, if the user specifies and invalid Github client ID, this results in a 404 page in Github. In this case, we want the user to be able to cancel out instead of being stuck at that step.
Depends on: https://github.com/hpcloud/helion-ui-framework/pull/143
Added on top of: https://github.com/hpcloud/stratos-ui/pull/651