Fix setup wizard when there's >20 channels

src/utils/arrays.ts

@@ -0,0 +1,10 @@
+export const chunk = <T>(arr: T[], len: number) => {
+  const chunks = [];
+
+  let i = 0;
+  while (i < arr.length) {
+    chunks.push(arr.slice(i, i += len));
+  }
+
+  return chunks;
+};