Hide/show header and footer without re-renders, take two (#1849)

* Remove callsites using the state value

* Remove unused code

* Change shell mode without re-renders

* Adjust "write your reply" for mode

src/view/shell/bottom-bar/BottomBarStyles.tsx

@@ -65,7 +65,4 @@ export const styles = StyleSheet.create({
     borderWidth: 1,
     borderRadius: 100,
   },
-  disabled: {
-    pointerEvents: 'none',
-  },
 })