Fix #278 - add sleep() times in e2e to make them work in CI runner

e2e/sidenav.po.ts

-import { by, element } from "protractor";
+import { browser, by, element } from "protractor";
 import * as path from "path";
 
 export class SideNav {
@@ -16,6 +16,7 @@ export class SideNav {
 
   async clickLoadSessionButton() {
     const ncb = this.getLoadSessionButton();
+    await browser.sleep(500);
     await ncb.click();
   }
 
@@ -23,6 +24,7 @@ export class SideNav {
     const absolutePath = path.resolve(__dirname, file);
     const input = this.getFileInput();
     await input.sendKeys(absolutePath);
+    await browser.sleep(500);
     if (click) {
       await this.getFileLoadButton().click();
     }