Samples: increase TestPattern1 width

samples/GraphicsTester.Portable/Scenarios/TestPattern1.cs

@@ -4,7 +4,7 @@ namespace GraphicsTester.Scenarios
 {
 	public class TestPattern1 : AbstractScenario
 	{
-		public TestPattern1() : base(1000, 1500)
+		public TestPattern1() : base(2000, 1500)
 		{
 		}