Dish manual cmd

This is intended to bring manual commands to the dish. Protocol is:

1. Bring Main in IdleManual
2. Send to Main event do_action with argument main-action set to cmd_main-start-manual-control
3. (Main enters in mode ManualControl)
4. Send manual commands with event do_action and argument main-action set to cmd-main-send-manual-command. Arguments can be provided with arg sub element.