8182638: [macosx] Active modal dialog is hidden by another non-active one

Reviewed-by: azvegint, dmarkov

src/java.desktop/macosx/classes/sun/lwawt/macosx/CPlatformWindow.java

@@ -674,6 +674,7 @@ public class CPlatformWindow extends CFRetainedResource implements PlatformWindo
                         CWrapper.NSWindow.orderWindow(ptr, CWrapper.NSWindow.NSWindowAbove, ownerPtr);
                     });
                 });
+                execute(CWrapper.NSWindow::orderFront);
                 applyWindowLevel(target);
             }