ModalReductionPlugIn:

-------------------------------------------------------------------------------
   Create a ModalReduction plug in for the ControlDesignGUI.
-------------------------------------------------------------------------------
   Form:
   x = ModalReductionPlugIn( action, modifier, hFig, position, callback )
-------------------------------------------------------------------------------

   ------
   Inputs
   ------
   action      (1,:)  Action 'initialize', 'update'
   modifer     (1,:)  Modifier to the action or data structure if intialization
   hFig        (1,1)  Handle to the figure or if 'update' radio button handles
   position    (1,4)  [left bottom width height]
   callback    (1,:)  Callback string when something has changed in this gui

   -------
   Outputs
   -------
   x           (1,1)  The tag if action is 'initialize'
                             

-------------------------------------------------------------------------------

Children:

Common: Classes/@statespace/statespace.m
Common: Control/EigEval
Common: Control/Step
Common: ControlGUI/ControlDesignGUI
Common: General/GetNewTag
Common: Graphics/Plot2D