Automatically navigate to last board visited

What does this MR do?

When visiting a group or project board, we record that it's been visited in the DB. When navigating to the top level board, we query for the latest board visited and redirect to it.

What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ee/issues/7760

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