New issue look now generally available

Background

17.11 release post should cover GA release of issue work items, mirroring the 17.10 release post for beta.

Release notes

As of 17.11, the new issue look is generally available and replaces the legacy issue experience. Issues now share a common framework with epics and tasks, featuring real-time updates and workflow improvements:

• Drawer view: You can open items from lists or boards in a drawer for quick viewing without leaving your current context. A button at the top lets you expand to a full-page view.
• Change type: Convert types between epics, issues, and tasks using the “Change type” action (replaces “Promote to epic”)
• Start date: Issues now support start dates, aligning their functionality with epics and tasks.
• Ancestry: The complete hierarchy is above the title and the Parent field in the sidebar. To manage relationships, use the new quick action commands /set_parent, /remove_parent, /add_child, and /remove_child.
• Controls: All actions are now accessible from the top menu (vertical ellipsis), which remains visible in the sticky header when scrolling.
• Development: All development items (merge requests, branches, and feature flags) related to an issue or task are now consolidated in a single, convenient list.
• Layout: UI improvements create a more seamless experience between issues, epics, tasks, and merge requests, helping you navigate your workflow more efficiently.
• Linked items: Create relationships between tasks, issues, and epics with improved linking options. Drag and drop to change link types and toggle the visibility of labels and closed items.

https://docs.gitlab.com/user/project/issues/issue_work_items/