merged collider and material fixes

Assets/Common/Prefabs/ARPlane.prefab

   - component: {fileID: 8482017780723374618}
   - component: {fileID: 5736581594543791272}
   - component: {fileID: 4850567699770404709}
-  - component: {fileID: 3677315450072829694}
   - component: {fileID: 7953324094329720777}
   - component: {fileID: 7096468269689538693}
   - component: {fileID: 8552019320052076660}
   m_Script: {fileID: 11500000, guid: 3d180956a54db4646a1c6342921672ad, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
---- !u!64 &3677315450072829694
-MeshCollider:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 4776765576899091622}
-  m_Material: {fileID: 0}
-  m_IsTrigger: 0
-  m_Enabled: 1
-  serializedVersion: 3
-  m_Convex: 0
-  m_CookingOptions: 30
-  m_Mesh: {fileID: 0}
 --- !u!33 &7953324094329720777
 MeshFilter:
   m_ObjectHideFlags: 0

Assets/ImageTracking/Art/Three/ThreeMat.mat

   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_Name: ThreeMat
-  m_Shader: {fileID: 4800000, guid: 933532a4fcc9baf4fa0491de14d08ed7, type: 3}
+  m_Shader: {fileID: 46, guid: 0000000000000000f000000000000000, type: 0}
-  m_CustomRenderQueue: 2000
-  stringTagMap:
-    RenderType: Opaque
+  m_CustomRenderQueue: -1
+  stringTagMap: {}
   disabledShaderPasses: []
   m_SavedProperties:
     serializedVersion: 3

Assets/ImageTracking/Art/Two/TwoMat.mat

   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_Name: TwoMat
-  m_Shader: {fileID: 4800000, guid: 933532a4fcc9baf4fa0491de14d08ed7, type: 3}
+  m_Shader: {fileID: 46, guid: 0000000000000000f000000000000000, type: 0}
-  m_CustomRenderQueue: 2000
-  stringTagMap:
-    RenderType: Opaque
+  m_CustomRenderQueue: -1
+  stringTagMap: {}
   disabledShaderPasses: []
   m_SavedProperties:
     serializedVersion: 3

Assets/Meshing/Scenes/Meshing.unity

   m_Script: {fileID: 11500000, guid: e1760703bbd54c04488a8d10600262ab, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  m_PlanePrefab: {fileID: 0}
+  m_PlanePrefab: {fileID: 4776765576899091622, guid: 635f0c5c56e955042b05a01c20415c3b,
+    type: 3}
   m_DetectionMode: -1
 --- !u!114 &121553692
 MonoBehaviour: