Sign in page > Broadcast message is clipped when using header

Summary

When a user adds a Header within Admin > Settings > Appearance, as well as a Broadcast message, the broadcast message will the clipped on the sign in page.

Steps to reproduce

1. Add a Header within the Admin area
2. Create a broadcast message
3. Log out and view the sign in screen

What is the current bug behavior?

The broadcast message is clipped

What is the expected correct behavior?

The broadcast message should be fully visible

Relevant logs and/or screenshots

Implementation plan

1. Add the below to app/assets/stylesheets/pages/login.scss#L214

&.with-system-header {
  .login-page-broadcast {
    margin-top: $system-header-height + $header-height;
  }
}

2. Regenerate startup css