Added doxygen comments to UIElement

Modules/Contents/UI/Include/PolyUIElement.h

@@ -25,7 +25,11 @@
 #include "PolyScreenEntity.h"
 
 namespace Polycode {
-	
+	/*
+	 * Base class for all UI widgets.
+	 *
+	 * processInputEvent is set to true by default.
+	 */
 	class _PolyExport UIElement : public ScreenEntity {
 		public:
 			UIElement();
@@ -37,4 +41,4 @@ namespace Polycode {
 			
 	};
 	
-}
+}