close all files to make test work

apps/remix-ide-e2e/src/tests/plugin_api.ts

 'use strict'
 import { ExternalProfile, LocationProfile, Profile } from '@remixproject/plugin-utils'
 import { NightwatchBrowser } from 'nightwatch'
-import { resolve } from 'url'
 import init from '../helpers/init'
 
 declare global {

apps/remix-ide/src/app/panels/file-panel.js

@@ -251,6 +251,7 @@ module.exports = class Filepanel extends ViewPlugin {
     if (checkSpecialChars(workspaceName) || checkSlash(workspaceName)) throw new Error('special characters are not allowed')
     if (await this.workspaceExists(workspaceName)) throw new Error('workspace already exists')
     else {
+      await this.call('fileManager', 'closeAllFiles')
       const workspaceProvider = this._deps.fileProviders.workspace
       await this.processCreateWorkspace(workspaceName)
       workspaceProvider.setWorkspace(workspaceName)