grid.js in highcharts-js-rails-1.0.0

- old
+ new

@@ -86,9 +86,17 @@
 	},
 	labels: {
 		style: {
 			color: '#99b'
 		}
+	},
+
+	navigation: {
+		buttonOptions: {
+			theme: {
+				stroke: '#CCCCCC'
+			}
+		}
 	}
 };
 
 // Apply the theme
 var highchartsOptions = Highcharts.setOptions(Highcharts.theme);