click outside did not close the portal in some cases because HTML tag…

…name was ignored, that was because we tried to prevent closing when scrollbar was clicked, however this is a bigger issue... if you know about some workaround for ignoring scrollbar, let me know

lib/portal.js

@@ -136,7 +136,7 @@ export default class Portal extends React.Component {
     if (!this.state.active) { return; }
 
     const root = findDOMNode(this.portal);
-    if (root.contains(e.target) || e.target.tagName === 'HTML' || e.button !== 0) { return; }
+    if (root.contains(e.target) || e.button !== 0) { return; }
 
     e.stopPropagation();
     this.closePortal();