Keep inspect mode consistent across renderer changes

If you were in inspect mode, switched to open layers, and back to
MapboxGlMap, the state in MapboxGlMap and MapboxInspect diverged,
meaning MapboxGlMap thought it was in inspect mode, while MapboxInspect
had inspector mode disabled.

src/components/map/MapboxGlMap.jsx

@@ -174,6 +174,9 @@ export default class MapboxGlMap extends React.Component {
 
     map.on("style.load", () => {
       this.setState({ map, inspect });
+      if(this.props.inspectModeEnabled) {
+        inspect.toggleInspector();
+      }
     })
 
     map.on("data", e => {