[Option to?] default `/dashboard` to Workflows rather than Builds
As a CircleCI 2.0 user who uses workflows, the Builds list is a lot less useful than the Workflows list.
This is especially true now that Circle have removed the "Rebuild" link from the Builds list (I'm guessing this is only for workflow builds, because of the problems that caused)
However, after logging in, I'm still taken the the Builds view by default.
I don't know if many people are mixing CCI1 with CCI2, but I'd guess that most people *either* predominantly use one of the two views. I should be able to choose which my initial view is.