Fix pipelines info being hidden in merge request widget

We do need these "ci-#{status}" classes because we use them in
MergeRequestWidget to show correct divs.

app/views/projects/merge_requests/widget/_heading.html.haml

 - if @pipeline
   .mr-widget-heading
     - %w[success success_with_warnings skipped canceled failed running pending].each do |status|
-      .ci_widget{ class: "ci-status-icon-#{status}", style: ("display:none" unless @pipeline.status == status) }
+      .ci_widget{ class: "ci-#{status} ci-status-icon-#{status}", style: ("display:none" unless @pipeline.status == status) }
         = ci_icon_for_status(status)
         %span
           Pipeline

changelogs/unreleased/25055-pipelines-info-missing-from-mr-widget.yml

+---
+title: Fix pipelines info being hidden in merge request widget
+merge_request: 7808
+author: