Fix iteration token value on load

What does this MR do and why?

For issue boards and issues list, when the URL is up to date with an iteration id but you reload the page, this makes sure that the token value is updated with the title not just the id.

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How to set up and validate locally

1. Feature.enable(:vue_issues_list)
2. Feature.enable(:issue_boards_filtered_search)
3. Add an iteration to the issues list filtered search or the issues board filtered search
4. refresh the page
5. Notice that the title replaces the id.

Resolves #346974 (closed) and #346973 (closed)

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

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