* Fixed the clear screen problems. The screen is now automatically cleared every frame by the engine if there are no maps loaded. In the process I removed the setClearBackBuffer() function from the RenderBackend.

<Panel name="errorWindow" title="Error" min_size="300, 100">
	<ScrollArea>
		<Label name="message" text="Error:" wrap_text="1" vexpand="1"/>
	</ScrollArea>
	<Button name="okButton" text="OK"/>
</Panel>