Unify proptypes in util/proptypes.js (#3728)

* Unify proptypes in util/proptypes.js

* Add missing use of nodeOrStringProptype

js/src/ui/ConfirmDialog/confirmDialog.js

@@ -1,7 +1,25 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
 import React, { Component, PropTypes } from 'react';
 import ActionDone from 'material-ui/svg-icons/action/done';
 import ContentClear from 'material-ui/svg-icons/content/clear';
 
+import { nodeOrStringProptype } from '~/util/proptypes';
+
 import Button from '../Button';
 import Modal from '../Modal';
 
@@ -15,9 +33,7 @@ export default class ConfirmDialog extends Component {
     iconDeny: PropTypes.node,
     labelConfirm: PropTypes.string,
     labelDeny: PropTypes.string,
-    title: PropTypes.oneOfType([
-      PropTypes.node, PropTypes.string
-    ]).isRequired,
+    title: nodeOrStringProptype.isRequired,
     visible: PropTypes.bool.isRequired,
     onConfirm: PropTypes.func.isRequired,
     onDeny: PropTypes.func.isRequired