found one more file that needed to be changed over to new button

Author: samrocksc

src/views/help-overlay.js

@@ -1,7 +1,7 @@
 'use strict';
 
 const React = require('react');
-const Button = require('react-material/components/Button');
+const Button = require('../components/button');
 
 const Overlay = require('../components/overlay');
 const OverlayTitle = require('../components/overlay-title');