Added drag to scroll container

src/utils.ts

@@ -34,3 +34,7 @@ export function shuffleInplace<T>(array: T[], rng: PRNG): T[] {
   }
   return array
 }
+
+export function fixedEncodeURIComponent(str: string): string {
+  return encodeURIComponent(str).replace(/[!'()*]/g, c => '%' + c.charCodeAt(0).toString(16));
+}