Objective_State( <objective_number>, <state> )
Module: Objective
Summary:
Sets the state of an objective
Example:
Objective_State( 8, "done" );
Required Args:
1 : <objective_number> The number of the objective to alter
2 : <state> A string value representing the state of the objective. Valid states are "empty", "active", "invisible", "done", "current" and "failed"