Infra/keyboard tracking view fix import and add to menu (#671)

* Add missing import

* Add screens to menu

Author: M-i-k-e-l

demo/src/screens/MenuStructure.js

@@ -77,9 +77,9 @@ export const navigationData = {
         screen: 'unicorn.nativeComponents.HighlightOverlayViewScreen'
       },
       {title: 'Wheel Picker', tags: 'wheel picker', screen: 'unicorn.nativeComponents.WheelPickerViewScreen'},
-      {title: 'SafeArea Spacer', tags: 'native safe area', screen: 'unicorn.nativeComponents.SafeAreaSpacerViewScreen'}
-      // {title: 'KeyboardTracking (iOS)', tags: 'KeyboardTracking', screen: 'unicorn.nativeComponents.KeyboardTrackingViewScreen'},
-      // {title: 'KeyboardInput', tags: 'KeyboardInput', screen: 'unicorn.nativeComponents.KeyboardInputViewScreen'},
+      {title: 'SafeArea Spacer', tags: 'native safe area', screen: 'unicorn.nativeComponents.SafeAreaSpacerViewScreen'},
+      {title: 'KeyboardTracking (iOS)', tags: 'KeyboardTracking', screen: 'unicorn.nativeComponents.KeyboardTrackingViewScreen'},
+      {title: 'KeyboardInput', tags: 'KeyboardInput', screen: 'unicorn.nativeComponents.KeyboardInputViewScreen'}
     ]
   },
   Screens: {

demo/src/screens/nativeComponentScreens/KeyboardTrackingViewScreen.js

@@ -8,7 +8,8 @@ import {
   Image,
   Colors,
   Switch,
-  Constants
+  Constants,
+  Spacings
 } from 'react-native-ui-lib';
 const KeyboardTrackingView = Keyboard.KeyboardTrackingView;