test: Stack Scroll, Right-click to zoom, Middle-click to Pan (#1073)

* E2E tests: Stack Scroll, Right-click to zoom, Middle-click to Pan

* About modal tests and added some cypress selectors

* Checking app version number

* Removed accidental import

* Review fixes

platform/ui/src/components/userPreferencesModal/AboutModal.js

@@ -92,7 +92,7 @@ class AboutModal extends Component {
         <Modal.Header closeButton>
           <Modal.Title>{t('OHIF Viewer - About')}</Modal.Title>
         </Modal.Header>
-        <Modal.Body>
+        <Modal.Body data-cy="about-modal">
           <div className="btn-group">
             <a
               className="btn btn-default"