Require phrase confirmation. (#5731)

* Require phrase confirmation.

* Linting issues.

* Fix dialog title.

* Confirm a backup phrase.

* Confirm recovery phrase on fist run as well.

js/src/ui/Form/Input/input.js

@@ -57,6 +57,7 @@ export default class Input extends Component {
       PropTypes.string,
       PropTypes.bool
     ]),
+    allowPaste: PropTypes.bool,
     autoFocus: PropTypes.bool,
     children: PropTypes.node,
     className: PropTypes.string,
@@ -97,6 +98,7 @@ export default class Input extends Component {
 
   static defaultProps = {
     allowCopy: false,
+    allowPaste: true,
     escape: 'initial',
     hideUnderline: false,
     onBlur: noop,
@@ -221,6 +223,12 @@ export default class Input extends Component {
   }
 
   onChange = (event, value) => {
+    if (!this.props.allowPaste) {
+      if (value.length - this.state.value.length > 8) {
+        return;
+      }
+    }
+
     event.persist();
 
     this.setValue(value, () => {