Fixed the href attributes of tabs in todos dashboard

Rinku Crequested to merge
gitlab-community/gitlab-org/gitlab:rc_fix_dashboard_todos_tab_links into master

What does this MR do and why?

Fixed the href attributes of tabs in todos dashboard

References

#585216

Screenshots or screen recordings

Before After

How to set up and validate locally

  1. Checkout this branch and run gdk locally
  2. Go to todos page http://gdk.local/dashboard/todos
  3. Try opening Snooze or Done tabs in new tabs by right click > open in new tab
  4. Notice the Snooze or Done tab being opened in new tab respectively
  5. Compare to master branch where To Do tab is selected in both cases

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