The Sidebar-links plugin lets the admin define custom links showing in the left margin area. This works fine in most view types, but the delivery pipeline views do not display these links unfortunately.

Quick note (may or may not be relevant to the fix here) a pending improvement for the sidebar-link plugin is to allow per-view links, or custom links that are specific to each view (currently, it's global for all views), so most likely the Edit View screen will have to include a section provided by the sidebar-link plugin.