Resolve "Missing margin between loading icon and text in Merge Request Widget"

What does this MR do?

• Fix margin between loading icon and text in Merge Request Widget

Why was this MR needed?

• The loading icon wasn't giving the Merge Request Widget text enough room, making it uncomfortable and awkward for both elements

Screenshots (if relevant)

Before	After

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #27947 (closed)