Fixed screenshot width and button colors.

Author: maratal

src/images/content/screenshots/getting-started/react-native-push-getting-started-guide.png

@@ -474,8 +474,6 @@ btnRed: {backgroundColor: '#dc3545'},
 btnPurple: {backgroundColor: '#6f42c1'},
 btnOrange: {backgroundColor: '#fd7e14'},
 btnBlue: {backgroundColor: '#007bff'},
-btnIndigo: {backgroundColor: '#6610f2'},
-btnTeal: {backgroundColor: '#20c997'},
 ```
 </Code>
 
@@ -579,10 +577,10 @@ Add three more buttons to the `buttons` view in your `return` statement:
 
 <Code>
 ```react
-<TouchableOpacity style={[styles.btn, styles.btnIndigo]} onPress={sendPushToDevice}>
+<TouchableOpacity style={[styles.btn, styles.btnBlue]} onPress={sendPushToDevice}>
   <Text style={styles.btnText}>Send Push to Device</Text>
 </TouchableOpacity>
-<TouchableOpacity style={[styles.btn, styles.btnTeal]} onPress={sendPushToClient}>
+<TouchableOpacity style={[styles.btn, styles.btnBlue]} onPress={sendPushToClient}>
   <Text style={styles.btnText}>Send Push to Client</Text>
 </TouchableOpacity>
 <TouchableOpacity style={[styles.btn, styles.btnBlue]} onPress={sendPushToChannel}>