Update test scene to be able to see a bit more

osu.Game.Tests/Visual/Editing/TimelineTestScene.cs

@@ -53,13 +53,10 @@ private void load(AudioManager audio)
                         new AudioVisualiser(),
                     }
                 },
-                TimelineArea = new TimelineArea
+                TimelineArea = new TimelineArea(CreateTestComponent())
                 {
-                    Child = CreateTestComponent(),
                     Anchor = Anchor.Centre,
                     Origin = Anchor.Centre,
-                    RelativeSizeAxes = Axes.X,
-                    Size = new Vector2(0.8f, 100),
                 }
             });
         }