Update broadcast message icons

Add icons from gitlab-svgs
Remove btn-sm class for better sizing

Add changelog

Update mr number changelog

Change to sprite_icon

app/views/admin/broadcast_messages/index.html.haml

@@ -32,7 +32,7 @@
           %td
             = message.ends_at
           %td
-            = link_to icon('pencil-square-o'), edit_admin_broadcast_message_path(message), title: 'Edit', class: 'btn btn-sm'
-            = link_to icon('times'), admin_broadcast_message_path(message), method: :delete, remote: true, title: 'Remove', class: 'js-remove-tr btn btn-sm btn-danger'
+            = link_to sprite_icon('pencil-square'), edit_admin_broadcast_message_path(message), title: 'Edit', class: 'btn'
+            = link_to sprite_icon('remove'), admin_broadcast_message_path(message), method: :delete, remote: true, title: 'Remove', class: 'js-remove-tr btn btn-danger'
 
   = paginate @broadcast_messages, theme: 'gitlab'

changelogs/unreleased/39304-broadcast-message-buttons.yml

+---
+title: Update broadcast message action icons
+merge_request: 28496
+author: Jarek Ostrowski @jareko
+type: fixed