merge additional player cards

src/accessories/CampaignImporterExporter.ttslua

@@ -111,7 +111,28 @@ function importFromToken()
     if objData.Nickname == "Additional Player Cards" then
       local additionalIndex = guidReferenceApi.getObjectByOwnerAndType("Mythos", "AdditionalPlayerCardsBag")
       if additionalIndex then
+        objData.GUID = additionalIndex.getGUID()
         spawnData.position = additionalIndex.getPosition()
+
+        -- merge contained objects
+        local existingIndexData = additionalIndex.getData()
+        objData.ContainedObjects = objData.ContainedObjects or {}
+
+        -- lookup table by Nickname
+        local containedObjectLookUp = {}
+        for _, deepData in ipairs(objData.ContainedObjects) do
+          if deepData.Nickname ~= "" then
+            containedObjectLookUp[deepData.Nickname] = true
+          end
+        end
+
+        -- add existing objects to new box
+        for _, deepData in ipairs(existingIndexData.ContainedObjects or {}) do
+          if deepData.Nickname ~= "" and containedObjectLookUp[deepData.Nickname] ~= true then
+            table.insert(objData.ContainedObjects, deepData)
+          end
+        end
+
         additionalIndex.destruct()
       end
     else