style fix for toolbar in Atom v1.8

Author: ShMcK

CHANGELOG.md

@@ -13,6 +13,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
   - update tutorial button
 - remove 'lodash' dependency
 - attach hints to toolbar
+- style fix for Atom v1.8
 
 ## [0.6.0] - 2016-04-01
 - fixes

src/components/page/toolbar/_toolbar.less

@@ -1,4 +1,5 @@
 .cr-page-toolbar {
+  z-index: 10000;
   position: fixed;
   bottom: 0;
   right: 0;