Add user_dropdown_link to prompt users to turn on new repo

app/views/layouts/header/_default.html.haml

@@ -76,6 +76,7 @@
                     = link_to "Settings", profile_path
                   %li
                     = link_to "Turn on new navigation", profile_preferences_path(anchor: "new-navigation")
+                  = render 'shared/repo/user_dropdown_link'
                   %li.divider
                   %li
                     = link_to "Sign out", destroy_user_session_path, method: :delete, class: "sign-out-link"

app/views/layouts/header/_new.html.haml

@@ -70,6 +70,7 @@
                     = link_to "Settings", profile_path
                   %li
                     = link_to "Turn off new navigation", profile_preferences_path(anchor: "new-navigation")
+                  = render 'shared/repo/user_dropdown_link'
                   %li.divider
                   %li
                     = link_to "Sign out", destroy_user_session_path, method: :delete, class: "sign-out-link"

app/views/shared/repo/_user_dropdown_link.html.haml

+%li= link_to "Turn #{show_new_repo? ? 'off' : 'on'} new repository", profile_preferences_path(anchor: "new-repository")