Resolve "Merge request buttons spacing incorrect"

What does this MR do?

This MR fixes the spacing issue on MRs, refer to the picture below:

Before	After

What are the relevant issue numbers?

Closes #48494 (closed)

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