Improve "Authorize Git Provider" step

[quintesse]

The name "Authorize Git Provider" doesn't really show what the step really does, which is to ask the user where they want their repository created and what to name it. The authentication is just something that is done the very first time the user comes to that step.

Perhaps it should just be called "Git Repository"?

Also the "Log in & Authorize" button seems superfluous there because once you've logged in it's always grayed out. Could this perhaps become a two panel step?

Where one panel would show the current explanation on the left and just the authorize button on the right,

And another panel below it showing the user, organization and repository name fields on the right and some explanation on the left about creating a repository for the user.

We could perhaps hide the first panel once the user has been authenticated. (Do we allow people to perhaps re-do the authentication. Perhaps they want to attach a different GH account?)

[edewit]

@bdellasc what do you think?