Fix authentication to Drive

Steps to Reproduce:

• On Windows 10 without Nuxeo Drive installed (ensure it is uninstalled and .nuxeo-drive folder is deleted), open Edge and navigate to a folder in Nuxeo.
• Click on the Synchronization button.
• Download Nuxeo Drive and install.
• Set up the account (https://nightly-rainforest.nuxeo.com).
  • Note: in the Rainforest VMs, the test fails at this point when using https as the account's server URL. It seems like the connection is too slow on the VMs as the window displays "Not responding" for some time, then the Drive window displays the following error:

    CONNECTION ERROR: Please check server URL

=> Popup appears:

Did you mean to switch apps?
"Microsoft Edge" is trying to open "Desktop synchronization client for Nuxeo"

• Click YES.
  => Account should be successfully connected.
• Wait until the contents of the folder are synchronized on your computer.
• In the synchronized folder in Nuxeo, create a File document with a .docx as the main file.
• Once the file is created, click on the "Edit with Nuxeo Drive" icon underneath the attachment's preview.
  => Popup appears:

  Did you mean to switch apps?
  "Microsoft Edge" is trying to open "Desktop synchronization client for Nuxeo"

• Click YES.
  => Warning appears:

  Direct Edit - Nuxeo Drive
  User <NUXEO_USERNAME> on server http://nightly-rainforest.nuxeo.com/nuxeo is not signed in Nuxeo Drive on this computer

  • If the account URL specified is http, the crowd-testers also fail the test at this step.

While reproduced on a real Windows 10 computer, results varied between the crowd-testers' results (on VMs) and locally.
The test fails at different steps depending on whether the URL provided in the Drive Accounts setup is http or https.