Revert "Commented out an alpha-3 incompatible change. revert this commit afterwards."

This reverts commit fd5942b39b7619821b50dfbc02dca9643dc871bc.

jme3-core/src/com/jme3/gde/core/sceneexplorer/nodes/JmeMotionPath.java

@@ -294,7 +294,7 @@ public class JmeMotionPath extends AbstractSceneExplorerNode {
 
         Material m = new Material(SceneApplication.getApplication().getAssetManager(), "Common/MatDefs/Misc/Unshaded.j3md");
         m.setColor("Color", ColorRGBA.Red);
-        // Alpha4: m.getAdditionalRenderState().setLineWidth(4f);
+        m.getAdditionalRenderState().setLineWidth(4f);
 
         switch (motionPath.getPathSplineType()) {
             case CatmullRom: