Update New group view

Open Luke "Jared" Bennett requested to merge 20827-getting-started-update-new-group-view into master

What does this MR do?

Updates the New Group page to the design specified in #20827 (moved).

EE port: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1575

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Part of Getting Started meta.

Screenshots (if relevant)

Screen_Shot_2016-11-07_at_17.13.00

Screen_Shot_2016-11-07_at_17.13.17

Does this MR meet the acceptance criteria?

What are the relevant issue numbers?

Closes #20827 (moved)