#26703 change todos counter position & format ( for large counts )

What does this MR do?

Change todos counter position & format ( for counts >= 100 based on #26703 (closed) ).

Are there points in the code the reviewer needs to double check?

I'm not convenient with todos_count_format function name: it doesn't explain what the function really do.

Why was this MR needed?

Fix #26703 (closed)

Screenshots (if relevant)

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 #26703 (closed)