Added more webdriver tests testing against a real browser.

src/components/modals/OpenModal.jsx

@@ -133,6 +133,7 @@ class OpenModal extends React.Component {
     }
 
     return <Modal
+      data-wd-key="open-modal"
       isOpen={this.props.isOpen}
       onOpenToggle={() => this.onOpenToggle()}
       title={'Open Style'}
@@ -151,9 +152,9 @@ class OpenModal extends React.Component {
         <p>
           Load from a URL. Note that the URL must have <a href="https://enable-cors.org" target="_blank" rel="noopener noreferrer">CORS enabled</a>.
         </p>
-        <input type="text" ref={(input) => this.styleUrlElement = input} className="maputnik-input" placeholder="Enter URL..."/>
+        <input data-wd-key="open-modal.url.input" type="text" ref={(input) => this.styleUrlElement = input} className="maputnik-input" placeholder="Enter URL..."/>
         <div>
-          <Button className="maputnik-big-button" onClick={this.onOpenUrl.bind(this)}>Open URL</Button>
+          <Button data-wd-key="open-modal.url.button" className="maputnik-big-button" onClick={this.onOpenUrl.bind(this)}>Open URL</Button>
         </div>
       </section>