fix(FairyGUIFormHelper): 修复未设置动画属性时未使用默认值的问题

当UI表单未设置显示或隐藏动画属性时，现在会使用UI组件的默认动画设置值
GameFrameX/GameFrameX.Unity#40

Author: AlianBlank

Runtime/FairyGUIFormHelper.cs

@@ -109,13 +109,21 @@ public override IUIForm CreateUIForm(object uiFormInstance, Type uiFormType, obj
                 uiForm.EnableShowAnimation = optionShowAnimation.Enable;
                 uiForm.ShowAnimationName = optionShowAnimation.AnimationName;
             }
+            else
+            {
+                uiForm.EnableShowAnimation = m_UIComponent.IsEnableUIShowAnimation;
+            }
 
             var hideAnimationAttribute = uiFormType.GetCustomAttribute(typeof(OptionUIHideAnimationAttribute));
             if (hideAnimationAttribute is OptionUIHideAnimationAttribute optionHideAnimation)
             {
                 uiForm.EnableHideAnimation = optionHideAnimation.Enable;
                 uiForm.HideAnimationName = optionHideAnimation.AnimationName;
             }
+            else
+            {
+                uiForm.EnableHideAnimation = m_UIComponent.IsEnableUIHideAnimation;
+            }
 
             if (uiGroup == null)
             {