Add popToRoot to example-redux

android/app/src/main/java/com/reactnativenavigation/activities/BottomTabActivity.java

         for (ScreenStack stack: mScreenStacks) {
             if (stack.peek().navigatorId.equals(navigatorId)) {
                 Screen popped = stack.popToRoot();
-                setNavigationStyle(getCurrentScreen());
+                StyleHelper.updateStyles(mToolbar, getCurrentScreen());
                 return popped;
             }
         }

android/app/src/main/java/com/reactnativenavigation/activities/SingleScreenActivity.java

     public Screen popToRoot(String navigatorId) {
         super.popToRoot(navigatorId);
         Screen screen = mScreenStack.popToRoot();
-        setNavigationStyle(getCurrentScreen());
+        StyleHelper.updateStyles(mToolbar, getCurrentScreen());
         return screen;
     }
 

example-redux/src/screens/PushedScreen.js

           <Text style={styles.button}>Dismiss all modals</Text>
         </TouchableOpacity>
 
+        <TouchableOpacity onPress={ this.onPopToRootPress.bind(this) }>
+          <Text style={styles.button}>Pop to root</Text>
+        </TouchableOpacity>
+
         <TextInput style={{height: 40, borderColor: 'gray', borderWidth: 1}}/>
 
         <Text style={{fontWeight: '500'}}>String prop: {this.props.str}</Text>
   onDismissModal() {
     this.props.navigator.dismissModal();
   }
+
+  onPopToRootPress() {
+    this.props.navigator.popToRoot();
+  }
 }
 
 const styles = StyleSheet.create({