Sets the current plugin item to the inputed plugin.
        
        :param      plugin | <XWizardPlugin> || None

def setCurrentPlugin( self, plugin ):
        """
        Sets the current plugin item to the inputed plugin.
        
        :param      plugin | <XWizardPlugin> || None
        """
        item = self.uiWizardTABLE.currentItem()
        if ( not item ):
            return None
        
        return item.plugin()