Added owner to map and token keys, added map cache

src/database.js

@@ -2,9 +2,9 @@ import Dexie from "dexie";
 
 const db = new Dexie("OwlbearRodeoDB");
 db.version(1).stores({
-  maps: "id",
+  maps: "id, owner",
   states: "mapId",
-  tokens: "id",
+  tokens: "id, owner",
   user: "key",
 });