Remove existence & length checks on passwords & phrases (#3854)

* Allow input to receive FormattedMessage errors

* Only do existence checks on phrases & passwords

* Add missing import

* Remove existence checks, display security reminder

js/src/modals/CreateAccount/createAccount.js

@@ -15,6 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 import React, { Component, PropTypes } from 'react';
+import { FormattedMessage } from 'react-intl';
 import ActionDone from 'material-ui/svg-icons/action/done';
 import ActionDoneAll from 'material-ui/svg-icons/action/done-all';
 import ContentClear from 'material-ui/svg-icons/content/clear';
@@ -22,7 +23,7 @@ import NavigationArrowBack from 'material-ui/svg-icons/navigation/arrow-back';
 import NavigationArrowForward from 'material-ui/svg-icons/navigation/arrow-forward';
 import PrintIcon from 'material-ui/svg-icons/action/print';
 
-import { Button, Modal } from '~/ui';
+import { Button, Modal, Warning } from '~/ui';
 
 import AccountDetails from './AccountDetails';
 import AccountDetailsGeth from './AccountDetailsGeth';
@@ -86,6 +87,7 @@ export default class CreateAccount extends Component {
         actions={ this.renderDialogActions() }
         current={ stage }
         steps={ steps }>
+        { this.renderWarning() }
         { this.renderPage() }
       </Modal>
     );
@@ -200,6 +202,22 @@ export default class CreateAccount extends Component {
     }
   }
 
+  renderWarning () {
+    const { createType, stage } = this.state;
+
+    if (stage !== 1 || ['fromJSON', 'fromPresale'].includes(createType)) {
+      return null;
+    }
+
+    return (
+      <Warning warning={
+        <FormattedMessage
+          id='createAccount.warning.insecurePassword'
+          defaultMessage='It is recommended that a strong password be used to secure your accounts. Empty and trivial passwords are a security risk.' />
+      } />
+    );
+  }
+
   onNext = () => {
     this.setState({
       stage: this.state.stage + 1