Use gl_badge_tag for admin sidebar

app/views/layouts/nav/sidebar/_admin.html.haml

@@ -156,13 +156,13 @@
             = sprite_icon('slight-frown')
           %span.nav-item-name
             = _('Abuse Reports')
-          %span.badge.badge-pill.count= number_with_delimiter(AbuseReport.count(:all))
+          = gl_badge_tag number_with_delimiter(AbuseReport.count(:all)), variant: :info, size: :sm
         %ul.sidebar-sub-level-items.is-fly-out-only
           = nav_link(controller: :abuse_reports, html_options: { class: "fly-out-top-item" } ) do
             = link_to admin_abuse_reports_path do
               %strong.fly-out-top-item-name
                 = _('Abuse Reports')
-              %span.badge.badge-pill.count.merge_counter.js-merge-counter.fly-out-badge= number_with_delimiter(AbuseReport.count(:all))
+              = gl_badge_tag number_with_delimiter(AbuseReport.count(:all)), variant: :info, size: :sm
 
       = render_if_exists 'layouts/nav/sidebar/licenses_link'