Editor toling to easier create data assets

Source/ProjectEleriEditor/ProjectEleriEditor.Build.cs

@@ -21,6 +21,12 @@ public class ProjectEleriEditor : ModuleRules
 			"Projects", 
 			"ToolMenus",
 			"AssetRegistry",
+			// Asset categories are what the Content Browser files assets by, and in the engine version this
+			// project builds against a data asset type declares its own category as an asset definition
+			// rather than as an asset type action. AssetTools is still needed for the category bit the
+			// older Content Browser style files the Add menu by.
+			"AssetDefinition",
+			"AssetTools",
 			"ContentBrowser",
 			// The world map builder drives a scene capture and reads the render target back on the CPU, which
 			// is where the render thread and the pixel formats it copies between come in.