Add "includeMaps" config variable into `BaseGameMode`

sources/GameModes/BaseGameMode.uc

@@ -44,6 +44,8 @@ var protected config array<string>  includeFeature;
 //  `Feature`s to exclude from game mode, regardless of other settings
 //  (this one has highest priority)
 var protected config array<string>  excludeFeature;
+//  Lists of maps to include for this game mode
+var protected config array<string>  includeMaps;
 
 struct FeatureConfigPair
 {
@@ -75,17 +77,23 @@ protected function HashTable ToData()
     _.memory.Free(nextArray);
     nextArray = _.collections.EmptyArrayList();
     for (i = 0; i < excludeFeature.length; i += 1) {
-        nextArray.AddItem(_.text.FromString(excludeFeature[i]));
+        nextArray.AddString(excludeFeature[i]);
     }
     result.SetItem(P("excludeFeature"), nextArray);
     _.memory.Free(nextArray);
     nextArray = _.collections.EmptyArrayList();
     for (i = 0; i < includeMutator.length; i += 1) {
-        nextArray.AddItem(_.text.FromString(includeFeature[i]));
+        nextArray.AddString(includeFeature[i]);
     }
     result.SetItem(P("includeMutator"), nextArray);
     _.memory.Free(nextArray);
     nextArray = _.collections.EmptyArrayList();
+    for (i = 0; i < includeMaps.length; i += 1) {
+        nextArray.AddString(includeMaps[i]);
+    }
+    result.SetItem(P("includeMaps"), nextArray);
+    _.memory.Free(nextArray);
+    nextArray = _.collections.EmptyArrayList();
     for (i = 0; i < includeFeatureAs.length; i += 1)
     {
         nextPair = _.collections.EmptyHashTable();
@@ -120,6 +128,9 @@ protected function FromData(HashTable source)
     nextArray = source.GetArrayList(P("includeMutator"));
     includeMutator = DynamicIntoStringArray(nextArray);
     _.memory.Free(nextArray);
+    nextArray = source.GetArrayList(P("includeMaps"));
+    includeMaps = DynamicIntoStringArray(nextArray);
+    _.memory.Free(nextArray);
     nextArray = source.GetArrayList(P("includeFeatureAs"));
     if (nextArray == none) {
         return;