Squash project settings navs

app/assets/stylesheets/gitlab_bootstrap/nav.scss

app/controllers/deploy_keys_controller.rb

app/controllers/hooks_controller.rb

app/controllers/projects_controller.rb

app/controllers/services_controller.rb

app/controllers/team_members_controller.rb

app/views/deploy_keys/index.html.haml

app/views/deploy_keys/new.html.haml

app/views/deploy_keys/show.html.haml

app/views/hooks/index.html.haml

app/views/layouts/project_settings.html.haml

app/views/projects/_settings_nav.html.haml

app/views/projects/edit.html.haml

app/views/services/edit.html.haml

app/views/services/index.html.haml

app/views/team_members/import.html.haml

app/views/team_members/index.html.haml

app/views/team_members/new.html.haml