Added workspace tests

apps/remix-ide-e2e/src/tests/usingWebWorker.test.ts

 'use strict'
+import { NightwatchBrowser } from 'nightwatch'
 import init from '../helpers/init'
 import sauce from './sauce'
-import { NightwatchBrowser } from 'nightwatch'
 
 const sources = [
   {'browser/basic.sol': { content:

apps/remix-ide-e2e/src/tests/workspace.test.ts

+'use strict'
+import { NightwatchBrowser } from 'nightwatch'
+import init from '../helpers/init'
+import sauce from './sauce'
+
+module.exports = {
+  before: function (browser: NightwatchBrowser, done: VoidFunction) {
+    init(browser, done, 'http://127.0.0.1:8080?plugins=solidity,udapp', false)
+  },
+
+  'CheckSolidityActivatedAndUDapp': function (browser: NightwatchBrowser) {
+    browser
+    .waitForElementVisible('#icon-panel', 10000)
+    .clickLaunchIcon('solidity')
+    .clickLaunchIcon('udapp')
+    .end()
+  },
+  
+  tearDown: sauce
+}