Clean up logic for popup.

Assets/Menu2.unity

@@ -1816,7 +1816,7 @@ Canvas:
   m_OverrideSorting: 0
   m_OverridePixelPerfect: 0
   m_SortingBucketNormalizedSize: 0
-  m_AdditionalShaderChannelsFlag: 0
+  m_AdditionalShaderChannelsFlag: 25
   m_SortingLayerID: 0
   m_SortingOrder: 1
   m_TargetDisplay: 0
@@ -2937,6 +2937,7 @@ GameObject:
   - component: {fileID: 707529287}
   - component: {fileID: 707529286}
   - component: {fileID: 707529285}
+  - component: {fileID: 707529288}
   m_Layer: 5
   m_Name: PopupList
   m_TagString: Untagged
@@ -3012,6 +3013,20 @@ CanvasRenderer:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 707529283}
   m_CullTransparentMesh: 1
+--- !u!114 &707529288
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 707529283}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 0163e060f642c57498b7c58073d19e3e, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_popupPrefab: {fileID: 7484313361774163703, guid: fef0bd1fec806d2438e9567086c4dd3f,
+    type: 3}
 --- !u!1 &736199962
 GameObject:
   m_ObjectHideFlags: 0