Display default status emoji if only message is entered

What does this MR do?

Display the default emoji if only a status message is entered on the profile settings page.

What are the relevant issue numbers?

closes https://gitlab.com/gitlab-org/gitlab-ce/issues/50067

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides