WaitBarManager:

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   Manages the wait bar.

   WaitBarManager( 'initialize', struct('nSamp',10,'name','Name') );
   WaitBarManager( 'update', 3 );
   WaitBarManager( 'close' );
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   Form:
   WaitBarManager( action, d )
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   ------
   Inputs
   ------
   action        (1,:)   Action 'initialize', 'update', 'close'
   d             (1,1)   Input

   -------
   Outputs
   -------
   None   

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