Start the Engine right after account addition when the sync is disabled

Situation

Scenario:

• Ensure there is no account.
• Ensure the synchronization is disabled.
• Add an account.
• Plan a Direct Transfer with 1 file.

Current behavior:

• The transfer will not start.
• To start it, one has to restart the application.

Expected behavior:

• The transfer starts.

Analysis

Actually, the Engine is not started on purpose when adding a new account: see QMLDriveApi._bind_server() and NXDRIVE-1069.

Solution

The starts argument should be set to True when the synchronization is disabled.