feature(sendcoins): blinking cursor to show editing state for amount when they are not using LN

app/routes/app/components/components/Form/components/Pay/Pay.js

@@ -1,11 +1,17 @@
-import React from 'react'
+import React, { Component } from 'react'
 import PropTypes from 'prop-types'
 import { FaBolt, FaChain } from 'react-icons/lib/fa'
 import CurrencyIcon from '../../../../../../../components/CurrencyIcon'
 import { btc } from '../../../../../../../utils'
 import styles from './Pay.scss'
 
-const Pay = ({
+class Pay extends Component {
+  componentDidUpdate() {
+    if (this.props.paymentType !== 'lnd') { this.amountInput.focus() }
+  }
+
+  render() {
+    const {
       paymentType,
       setPaymentType,
       invoiceAmount,
@@ -18,7 +24,7 @@ const Pay = ({
       currency,
       crypto,
       close
-}) => {
+    } = this.props
     const payClicked = () => {
       if (payment_request.length !== 124) { return }
 
@@ -48,6 +54,7 @@ const Pay = ({
           </label>
           <input
             type='text'
+            ref={(input) => this.amountInput = input}
             size=''
             style={
               paymentType === 'ln' ?
@@ -118,6 +125,7 @@ const Pay = ({
       </div>
     )
   }
+}
 
 Pay.propTypes = {
   amount: PropTypes.oneOfType([