Fixed Inconsistent Shell Reference in AboutDialog

Author: brtnfld

hdfview/src/main/java/hdf/view/HDFView.java

@@ -1074,8 +1074,8 @@ private void setupMacOSMenuHandlers(final Shell shell)
                         log.debug("macOS About menu triggered");
                         // Use asyncExec to ensure the menu is closed before opening the modal dialog
                         display.asyncExec(() -> {
-                            if (!mainWindow.isDisposed()) {
-                                new AboutDialog(mainWindow).open();
+                            if (!shell.isDisposed()) {
+                                new AboutDialog(shell).open();
                             }
                         });
                     });