Only call onRecipient and onSender methods if defined in sender-to-recipient (#6247)

ui/app/components/sender-to-recipient/sender-to-recipient.component.js

@@ -97,7 +97,9 @@ export default class SenderToRecipient extends PureComponent {
         onClick={() => {
           this.setState({ recipientAddressCopied: true })
           copyToClipboard(checksummedRecipientAddress)
+          if (onRecipientClick) {
             onRecipientClick()
+          }
         }}
       >
         { this.renderRecipientIdenticon() }
@@ -164,7 +166,9 @@ export default class SenderToRecipient extends PureComponent {
           onClick={() => {
             this.setState({ senderAddressCopied: true })
             copyToClipboard(checksummedSenderAddress)
+            if (onSenderClick) {
               onSenderClick()
+            }
           }}
         >
           { this.renderSenderIdenticon() }