[馃帹 Design] Alert users regarding Epic work item URL change
Overview
With the migration to Epic work items, the URL will be changing for existing Epics. Although we shouldn't have links in the product (or through email) that navigate to the legacy URL, customers may have bookmarks or links outside of the product that are still using the old path. Redirects will be in place to ensure customers are taken to the new URL, but we should inform users of this change so that they can update any links/bookmarks outside of the product.
Proposal
When users navigate to the legacy URL, display a banner similar to what we use for moved groups/projects (shown below). Copy TBD.
/cc @amandarueda
Edited by Nick Brandt