JBR-1762: fixed review comments

because requesting focus for frame-parent causes to close whole popup chain

src/java.desktop/unix/classes/sun/awt/X11/XWindowPeer.java

@@ -25,23 +25,7 @@
 
 package sun.awt.X11;
 
-import java.awt.AWTEvent;
-import java.awt.Component;
-import java.awt.Dialog;
-import java.awt.Dimension;
-import java.awt.EventQueue;
-import java.awt.Frame;
-import java.awt.Graphics;
-import java.awt.GraphicsConfiguration;
-import java.awt.GraphicsDevice;
-import java.awt.GraphicsEnvironment;
-import java.awt.Image;
-import java.awt.Insets;
-import java.awt.Point;
-import java.awt.Rectangle;
-import java.awt.Shape;
-import java.awt.SystemColor;
-import java.awt.Window;
+import java.awt.*;
 import java.awt.event.ComponentEvent;
 import java.awt.event.FocusEvent;
 import java.awt.event.InvocationEvent;
@@ -52,6 +36,7 @@ import java.io.UnsupportedEncodingException;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
 import java.util.*;
+import java.util.List;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.locks.Condition;
 import java.util.concurrent.locks.Lock;
@@ -1302,9 +1287,20 @@ class XWindowPeer extends XPanelPeer implements WindowPeer,
          */
         if (isSimpleWindow()) {
             if (target == XKeyboardFocusManagerPeer.getInstance().getCurrentFocusedWindow()) {
-                Window owner = getDecoratedOwner((Window)target);
-                ((XWindowPeer)AWTAccessor.getComponentAccessor().getPeer(owner)).
-                        requestWindowFocus(() -> {}, () -> {});
+                // fix for: JBR-1762 Flotating navigation bar closes on navigate
+                // Use the same logic as in MacOS (see LWWindowPeer, was introduced in:
+                // 54bb2dd097 'JBR-1417 JBR 11 does not support chain of popups)'
+                Window targetOwner = ((Window)target).getOwner();
+                while (targetOwner != null && (targetOwner.getOwner() != null && !targetOwner.isFocusableWindow())) {
+                    targetOwner = targetOwner.getOwner();
+                }
+
+                if (targetOwner != null) {
+                    final XWindowPeer xwndpeer = ((XWindowPeer)AWTAccessor.getComponentAccessor().getPeer(targetOwner));
+                    if (xwndpeer != null) {
+                        xwndpeer.requestWindowFocus(() -> {}, () -> {});
+                    }
+                }
             }
         }
     }