Fix alignment of history only message

What does this MR do and why?

Fixes alignment of History only message and icon

Screenshots or screen recordings

Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Go to merge request
2. Select History only option from Sort or filter dropdown in Activity
3. Scroll down to bottom to see icon/message

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.