Update markup in file

app/views/profiles/notifications/show.html.haml

@@ -4,9 +4,11 @@
 %div
   - if @user.errors.any?
     .gl-alert.gl-alert-danger.gl-my-5
-      %button.js-close.gl-alert-dismiss{ type: 'button', 'aria-label' => _('Dismiss') }
+      .gl-alert-container
+        %button.js-close.btn.gl-dismiss-btn.btn-default.btn-sm.gl-button.btn-default-tertiary.btn-icon{ type: 'button', 'aria-label' => _('Dismiss') }
           = sprite_icon('close', css_class: 'gl-icon')
         = sprite_icon('error', css_class: 'gl-icon gl-alert-icon gl-alert-icon-no-title')
+        .gl-alert-content
           .gl-alert-body
             %ul
               - @user.errors.full_messages.each do |msg|