Get Selected Row - Get the table row selected by the user 
		
		This action returns the data of the row in a Table
		or a Simple Table which
		has been selected by the user.
		
		Trigger [required] 
		
		<Table> (non-repetitive trigger): The data of the table
		(a data structure corresponding to the table's display element).
		You would typically get it through a reference to a Table
		or a Simple Table element,
		or to a higher level display element containing it.
		
		Exits
		
		<Selected Row> (non-repetitive exit): The data
		of the selected row (if a Simple Table,
		simply the data structure defining the content of its rows; if a
		Table,
		a data structure that corresponds
		to the display elements contained in each row).
		
		<None Selected> (non-repetitive empty exit): Indication
		that no row has been selected by the user (you may choose to do nothing
		in this case or to display an warning message using
		Alert).
		
		Notice: The two exits represent two mutually exclusive possibilities:
		The exit <Selected Row> is activated only if the user has selected a row;
		the empty exit <None Selected> is activated only if no row has been selected.