Improve support for icons in new detailed statuses

app/views/projects/pipelines/_info.html.haml

@@ -2,7 +2,6 @@
   .header-main-content
     = ci_status_with_icon(@pipeline.detailed_status)
     %strong Pipeline ##{@commit.pipelines.last.id}
-    #{ci_label_for_status(@pipeline.detailed_status)},
     triggered #{time_ago_with_tooltip(@commit.authored_date)} by
     = author_avatar(@commit, size: 24)
     = commit_author_link(@commit)

lib/gitlab/ci/status/core.rb

@@ -30,7 +30,7 @@ module Gitlab
         # phasing legacy satuses out.
         #
         def to_s
-          self.class.name.demodulize.downcase
+          self.class.name.demodulize.downcase.underscore
         end
 
         def has_details?

lib/gitlab/ci/status/pipeline/success_with_warnings.rb

@@ -17,6 +17,10 @@ module Gitlab
             'icon_status_warning'
           end
 
+          def to_s
+            'success_with_warnings'
+          end
+
           def self.matches?(pipeline)
             pipeline.success? && pipeline.has_warnings?
           end