fix shader editor callout not being updated post namespace move

Author: dbastienMS

Assets/HoloToolkit/Utilities/Shaders/FastConfigurable/Shaders/FastConfigurable.shader

@@ -126,6 +126,6 @@ Shader "HoloToolkit/Fast Configurable"
         }
     } 
 
-	CustomEditor "FastConfigurableGUI"
+	CustomEditor "HoloToolkit.Unity.FastConfigurableGUI"
     Fallback "Legacy Shaders/VertexLit" //for shadow casting
 }

Assets/HoloToolkit/Utilities/Shaders/FastConfigurable/Shaders/FastConfigurable2Sided.shader

@@ -169,6 +169,6 @@ Shader "HoloToolkit/Fast Configurable 2 Sided"
         }
     } 
 
-	CustomEditor "FastConfigurable2SidedGUI"
+	CustomEditor "HoloToolkit.Unity.FastConfigurable2SidedGUI"
     Fallback "VertexLit" //for shadows
 }