Add '-a' as alias for '-advanced' to ShowModeParameter parsing

BauSystem_Main/src/de/steamwar/bausystem/tracer/show/ShowModeParameter.java

@@ -87,6 +87,7 @@ public class ShowModeParameter {
                     showModeParameter.interpolate_XZ = true;
                     break;
                 case "-advanced":
+                case "-a":
                     showModeParameter.interpolate_Y = true;
                     showModeParameter.interpolate_XZ = true;
                     break;