Set first responder field in window after popover shows.

binding/src/main/java/ch/cyberduck/binding/ProxyController.java

@@ -362,6 +362,7 @@ public class ProxyController extends AbstractController {
             this.positioningRect = positioningRect;
             this.controller = controller;
             this.controller.addHandler(this);
+            this.controller.addListener(this);
             this.behaviour = behaviour;
         }
 
@@ -378,7 +379,6 @@ public class ProxyController extends AbstractController {
             popover.setContentViewController(viewController);
             popover.showRelativeToRect_ofView_preferredEdge(positioningRect, positioningView,
                     FoundationKitFunctions.NSRectEdge.NSMinYEdge);
-            controller.addListener(this);
         }
 
         @Override
@@ -410,6 +410,11 @@ public class ProxyController extends AbstractController {
             this.callback = callback;
         }
 
+        @Delegate
+        public void popoverDidShow(final NSNotification notification) {
+            controller.focus();
+        }
+
         @Delegate
         public void popoverWillClose(final NSNotification notification) {
             final NSObject popoverCloseReasonValue = notification.userInfo().objectForKey(NSPopover.NSPopoverCloseReasonKey);