[sql lab] allow users to save their queries (#2528)

* Allow users to save their queries

Fixing tests .

* Adding placeholder for Query Description

* initJQueryCSRF -> initJQueryAjaxCSRF

superset/assets/spec/javascripts/sqllab/AlertsWrapper_spec.jsx

@@ -0,0 +1,11 @@
+import React from 'react';
+import AlertsWrapper from '../../../javascripts/SqlLab/components/AlertsWrapper';
+import { describe, it } from 'mocha';
+import { expect } from 'chai';
+
+
+describe('AlertsWrapper', () => {
+  it('is valid', () => {
+    expect(React.isValidElement(<AlertsWrapper />)).to.equal(true);
+  });
+});