Inspector: Explose true/false values (#270)

* Inspector: Explose true/false values

`true`/`false` where hidden from the UI, they need to be transformed to strings.

* Update Inspector.tsx

app/src/Inspector.tsx

@@ -161,7 +161,7 @@ const FeatureProperties = (props: { feature: Feature }) => {
   const rows = tmp.map((d, i) => (
     <tr key={i}>
       <td>{d[0]}</td>
-      <td>{d[1]}</td>
+      <td>{typeof d[1] === "boolean" ? JSON.stringify(d[1]) : d[1]}</td>
     </tr>
   ));