Merge pull request #10858 from ejn/overlay-autopan-on-set-map-10843

Perform auto-pan when adding an Overlay to a Map

src/ol/Overlay.js

@@ -300,6 +300,7 @@ class Overlay extends BaseObject {
       } else {
         container.appendChild(this.element);
       }
+      this.performAutoPan();
     }
   }