Adapted rio_do_hola to use the new SoundManager. Fixed a bug in the sound manager that caused a sound to not be looped if it did not have a callback assigned to it. Looping a stream using timers doesn't loop perfectly. I'll fix this in the future.

<Panel title="Select an option">
	<VBox>
		<ScrollArea min_size="150,300">
			<ListBox name="optionDrop"/>	
		</ScrollArea>
		<HBox>
			<Button name="okButton" text="OK"/>
			<Button name="cancelButton" text="Cancel"/>
		</HBox>
	</VBox>
</Panel>