Scanner redirection doesn't work when you replace the shell on the Windows client

In case that you replace default shell on Windows TC with Horizon client or something else, the scanner redirection no longer works.

Tested with Windows 7 thin clients & Horizon view 7.0.2.

In "Scanner-scanmgr-<date>.txt" the following error is logged: [ERROR]: Supervisor failed while scan is working.

If you then manually start explorer.exe on the TC so that the shell starts and reconnect to the desktop the scanner redirection starts working. From this point on it will continue to work even with shell replaced.