CA-137236: Fix XenCenter Console crash when switching to remote desktop on Windows Server 2003 SP2

- Reverted "CP-4951: CAR-100: Remove Rdp2 console" because Rdpclient 6.0 is not included in Windows Server 2003 SP2;
- Redone the fix for CA-123779 (Unhandled exception in Console Tab View), by moving RDPSetSettings() call inside a try..catch block, so we handle any exception thrown while setting the rdp client properties.