graphs now deletable after loading ;)

src/ui/view/StatisticGraphPanel.java

@@ -146,7 +146,9 @@ public class StatisticGraphPanel extends JSplitPane {
 				JPanel parent = (JPanel) that.getParent();
 				for (int i = 0; i < parent.getComponentCount(); i++) {
 					if (parent.getComponent(i).equals(that)) {
-						parent.remove(parent.getComponent(i + 1));
+						if(parent.getComponentCount() > i + 1){
+							parent.remove(parent.getComponent(i+1));
+						}
 						break;
 					}
 				}