Updated styling of milestone type in dashboard milestones list

app/assets/stylesheets/framework/issue_box.scss

@@ -45,4 +45,9 @@
   &.status-box-upcoming {
     background: $gl-text-color-secondary;
   }
+
+  &.status-box-milestone {
+    color: $gl-text-color;
+    background: $gray-darker;
+  }
 }

app/views/shared/milestones/_milestone.html.haml

@@ -50,7 +50,7 @@
             - else
               = link_to 'Close Milestone', group_milestone_route(milestone, {state_event: :close }), method: :put, class: "btn btn-sm btn-grouped btn-close"
         - if dashboard
-          .status-box.status-box-upcoming
+          .status-box.status-box-milestone 
             = milestone_type