Fixed an issue where boolean values in node details of graphical expl…

…ain plan were not interpreted correctly. pgadmin-org#7662

web/pgadmin/static/js/Explain/Graphical.jsx

@@ -238,7 +238,7 @@ function NodeDetails({plan, download=false}) {
       } else {
         return (<tr key={key}>
           <td>{key}</td>
-          <td>{value}</td>
+          <td>{`${value !== undefined ? value : ''}`}</td>
         </tr>);
       }
     })}