Converts the ad-hoc design of the Material Editor to utilize the same inspector interface as most everything else does.

- Overhauls the material editor to simplify and streamline the logic behind it since the inspector does most of the work
- Tweak a few order positions of materialdefinition fields to work better
- Sets AO, Rough and Metal channel fields to use an enum type for human readability
- Updates the MaterialPreview gui control to work with assetIds
- MatEd now supports setting of parent material to inherit from
- Creating a new material now can prompt selecting an existing material to inherit from
- Can now edit the mapTo value of a material in the matEd
- New standalone Composite Texture Editor window for convering AO, Roughness and Metalness maps in a material to an ORMMap
- Can also star the creation of a composite texture via RMB context menu in AB on an image asset
- Moved logic of CubemapEditor from MatEd to it's own stuff
- Made ImageAsset fields now be more clear when they have nothing assigned, and also have a clear button to empty the field's value so it's consistent across the board
- Reorganized the layout of the gui and image files for the MatEd to be easier to navigate
- MaterialEditor now overlays the EditorGUI instead of being forcefully embedded in it, allowing easy editing of the MatEd Gui via the Gui editor

Templates/BaseGame/game/tools/assetBrowser/scripts/editAsset.tscript

@@ -16,6 +16,11 @@ function AssetBrowser::editAsset(%this, %assetDef)
    }
    else
    {
+      if(AssetDatabase.isDeclaredAsset(%assetDef))
+      {
+         %assetDef = AssetDatabase.acquireAsset(%assetDef);  
+      }
+      
       if(isObject(%assetDef))
       {
          %assetType = AssetDatabase.getAssetType(%assetDef.getAssetId());