Properly handle <enter> keystroke (#7747)

* Properly handle <enter> keystroke, closes #7737

* no-unused-vars

ui/app/components/ui/button/button.component.js

@@ -1,4 +1,4 @@
-import React, { Component } from 'react'
+import React from 'react'
 import PropTypes from 'prop-types'
 import classnames from 'classnames'
 
@@ -24,9 +24,24 @@ const typeHash = {
   'first-time': CLASSNAME_FIRST_TIME,
 }
 
-export default class Button extends Component {
-  static propTypes = {
+const Button = ({ type, submit, large, children, className, ...buttonProps }) => (
+  <button
+    type={submit && 'submit'}
+    className={classnames(
+      'button',
+      typeHash[type] || CLASSNAME_DEFAULT,
+      large && CLASSNAME_LARGE,
+      className
+    )}
+    { ...buttonProps }
+  >
+    { children }
+  </button>
+)
+
+Button.propTypes = {
   type: PropTypes.string,
+  submit: PropTypes.bool,
   large: PropTypes.bool,
   className: PropTypes.string,
   children: PropTypes.oneOfType([
@@ -36,21 +51,8 @@ export default class Button extends Component {
   ]),
 }
 
-  render () {
-    const { type, large, className, ...buttonProps } = this.props
+Button.defaultProps = {
+  submit: false,
+}
 
-    return (
-      <button
-        className={classnames(
-          'button',
-          typeHash[type] || CLASSNAME_DEFAULT,
-          large && CLASSNAME_LARGE,
-          className
-        )}
-        { ...buttonProps }
-      >
-        { this.props.children }
-      </button>
-    )
-  }
-}
+export default Button

ui/app/pages/first-time-flow/create-password/import-with-seed-phrase/import-with-seed-phrase.component.js

@@ -297,9 +297,9 @@ export default class ImportWithSeedPhrase extends PureComponent {
         </div>
         <Button
           type="primary"
+          submit
           className="first-time-flow__button"
           disabled={!this.isValid() || !termsChecked}
-          onClick={this.handleImport}
         >
           { t('import') }
         </Button>