save chart files

packages/web/src/charts/ChartToolbar.js

@@ -0,0 +1,12 @@
+import React from 'react';
+import ToolbarButton from '../widgets/ToolbarButton';
+
+export default function ChartToolbar({ save }) {
+  return (
+    <>
+      <ToolbarButton onClick={save} icon="icon save">
+        Save
+      </ToolbarButton>
+    </>
+  );
+}