Properly support Essex carrier

resources/factions/allies_1944.json

@@ -49,7 +49,8 @@
   ],
   "preset_groups": [
     "Ally Flak",
-    "WW2LST"
+    "WW2LST",
+    "WW2Essex"
   ],
   "naval_units": [
     "USS Bennington (CV-20)"
@@ -58,7 +59,9 @@
     "WW2 Asset Pack": "https://www.digitalcombatsimulator.com/en/products/other/wwii_assets_pack/"
   },
   "carrier_names": [],
-  "helicopter_carrier_names": [],
+  "helicopter_carrier_names": [
+    "USS Essex (CV-9)"
+  ],
   "has_jtac": false,
   "doctrine": "ww2",
   "building_set": "ww2ally",

resources/groups/WW2Essex.yaml

@@ -0,0 +1,7 @@
+name: WW2Essex
+tasks:
+  - HelicopterCarrier
+units:
+  - USS Bennington (CV-20)
+layouts:
+  - WW2 Essex Carrier

resources/layouts/naval/WW2-Essex_Carrier.yaml

@@ -0,0 +1,10 @@
+name: WW2 Essex Carrier
+tasks:
+  - HelicopterCarrier
+groups:
+  - Carrier: # the word "Carrier" or "LHA" needs to be present in the group-name
+    - name: WW2 Carrier Group 0
+      unit_count:
+        - 1
+      unit_types:
+        - Essex