feat(Translations): add sanitized formatted html

packages/blockchain-wallet-v4-frontend/package.json

@@ -99,6 +99,7 @@
     "redux-saga": "0.16.0",
     "redux-ui": "0.1.1",
     "reselect": "^3.0.1",
+    "sanitize-html": "1.18.2",
     "styled-components": "3.2.4",
     "zxcvbn": "4.4.2"
   }

packages/blockchain-wallet-v4-frontend/src/components/SanitizedFormattedHTMLMessage/index.js

@@ -0,0 +1,23 @@
+import React from 'react'
+import PropTypes from 'prop-types'
+import { FormattedHTMLMessage } from 'react-intl'
+import sanitizeHtml from 'sanitize-html'
+
+class SanitizedFormattedHTMLMessage extends React.Component {
+  clean (dirty) {
+    return sanitizeHtml(dirty, { allowedTags: ['span', 'a'] })
+  }
+
+  render () {
+    const { id, defaultMessage } = this.props
+    const clean = this.clean(defaultMessage)
+    return clean ? <FormattedHTMLMessage id={id} defaultMessage={clean} /> : null
+  }
+}
+
+SanitizedFormattedHTMLMessage.propTypes = {
+  id: PropTypes.string.isRequired,
+  defaultMessage: PropTypes.string.isRequired
+}
+
+export default SanitizedFormattedHTMLMessage

packages/blockchain-wallet-v4-frontend/src/scenes/Login/template.js

@@ -8,6 +8,7 @@ import { LinkContainer } from 'react-router-bootstrap'
 import { required } from 'services/FormHelper'
 import { Button, Link, Separator, Text, TextGroup, HeartbeatLoader } from 'blockchain-info-components'
 import { Form, FormError, FormGroup, FormItem, FormLabel, PasswordBox, TextBox } from 'components/Form'
+import SanitizedFormattedHTMLMessage from 'components/SanitizedFormattedHTMLMessage'
 import Modals from 'modals'
 import MobileLogin from 'modals/MobileLogin'