[ue4] Closes #2144, allow setting skeleton data of widget at runtime.

spine-ue4/Plugins/SpinePlugin/Source/SpinePlugin/Private/SpineWidget.cpp

@@ -168,6 +168,9 @@ void USpineWidget::CheckState() {
 				state->setRendererObject((void *) this);
 				state->setListener(callbackWidget);
 				trackEntries.Empty();
+				skeleton->setToSetupPose();
+				skeleton->updateWorldTransform();
+				slateWidget->SetData(this);
 			}
 		}