Merge branch 'issue_2406' into 'master'

app/assets/javascripts/projects_list.js.coffee

app/assets/stylesheets/pages/projects.scss

app/controllers/projects/forks_controller.rb

app/helpers/blob_helper.rb

app/helpers/icons_helper.rb

app/helpers/projects_helper.rb

app/views/layouts/nav/_project.html.haml

app/views/projects/buttons/_dropdown.html.haml

app/views/projects/forks/index.html.haml

app/views/projects/forks/new.html.haml

app/views/projects/tree/_tree_header.html.haml

app/views/shared/projects/_list.html.haml

app/views/shared/projects/_project.html.haml

config/routes.rb

features/project/fork.feature

features/steps/project/fork.rb

features/steps/project/forked_merge_requests.rb

spec/routing/project_routing_spec.rb