[unity] Multiple Canvas Renderers warnings: Fixed missing warning icon in SkeletonGraphic Inspector due to element width. Added console log statement when instantiating SkeletonGraphic as well.

spine-unity/Assets/Spine/Editor/spine-unity/Editor/Components/SkeletonGraphicInspector.cs

@@ -261,7 +261,7 @@ namespace Spine.Unity.Editor {
 								EditorGUILayout.LabelField(SpineInspectorUtility.TempContent("This mesh uses multiple atlas pages or blend modes.\n" +
 																							"You need to enable 'Multiple Canvas Renderers'\n" +
 																							"for correct rendering. Consider packing\n" +
-																							"attachments to a single atlas page if possible.", Icons.warning), GUILayout.Height(60), GUILayout.Width(340));
+																							"attachments to a single atlas page if possible.", Icons.warning), GUILayout.Height(60), GUILayout.Width(380));
 							}
 						}
 					}

spine-unity/Assets/Spine/Editor/spine-unity/Editor/Utility/Instantiation.cs

@@ -160,10 +160,15 @@ namespace Spine.Unity.Editor {
 				newTransform.position = isUI ? data.spawnPoint : RoundVector(data.spawnPoint, 2);
 
 				if (isUI) {
+					SkeletonGraphic skeletonGraphic = ((SkeletonGraphic)newSkeletonComponent);
 					if (usedParent != null && usedParent.GetComponent<RectTransform>() != null) {
-						((SkeletonGraphic)newSkeletonComponent).MatchRectTransformWithBounds();
+						skeletonGraphic.MatchRectTransformWithBounds();
 					} else
 						Debug.Log("Created a UI Skeleton GameObject not under a RectTransform. It may not be visible until you parent it to a canvas.");
+					if (skeletonGraphic.HasMultipleSubmeshInstructions() && !skeletonGraphic.allowMultipleCanvasRenderers)
+						Debug.Log("This mesh uses multiple atlas pages or blend modes. " +
+							"You need to enable 'Multiple Canvas Renderers for correct rendering. " +
+							"Consider packing attachments to a single atlas page if possible.", skeletonGraphic);
 				}
 
 				if (!isUI && usedParent != null && usedParent.transform.localScale != Vector3.one)