Add overflow:hidden to detail-page-header.
This prevents floated button group from slipping below the container's bottom border when forced to wrap to another line.
Addresses #13359 (closed).
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This prevents floated button group from slipping below the container's bottom border when forced to wrap to another line.
Addresses #13359 (closed).