Returns the currently selected plugin.
        
        :return     <XWizardPlugin> || None

def currentPlugin( self ):
        """
        Returns the currently selected plugin.
        
        :return     <XWizardPlugin> || None
        """
        col    = self.uiWizardTABLE.currentColumn()
        row    = self.uiWizardTABLE.currentRow()
        item   = self.uiWizardTABLE.currentItem()
        widget = self.uiWizardTABLE.cellWidget(row, col)
        
        if ( not (widget and item and item.isSelected()) ):
            return None
            
        return widget.plugin()