Milestone report updates needed with introduction of consolidated list

MR: Update milestone reports links to work items (!214428 - merged)

Summary

With moving to the consolidated list page, there are areas of the Milestone report that need addressed such as updating some of the links and utilizing the new work items icon.

Proposal

• Update the list headers (underneath Tabs) to use the work-items icon rather than the issues icon.
• Update the links that navigate to the list page to use the work items list
  • In the right sidebar the links for "Open" & "Closed" (under Work items) should navigate to the work item list (and use associated filters).
  • When items within "Work items" Tab is greater than 500, the alert we show which includes a "View all" link should go to the work item list.
  • Verify there are no other links to the legacy list view