Fix missing claims in large collection (#726)

## Issue
A huge list like http://localhost:9090/$/list/d91815c1bc8c80a1f354284a8c8e92d84d5f07a6 (193 items) often produces fewer results in the final rendered list.

## Cause
The same list of IDs was passed into `claim_search`, and we just increment the `page`. However, it seems like `claim_search` does not honor the order between each call, and some results from the previous page took the place of the results in the next page.  The total is the same, but there are now duplicates.

## Fix
When batching, slice the ID list ourselves to bypass the problem for now.

ui/redux/actions/collections.js

@@ -160,8 +160,8 @@ export const doFetchItemsInCollections = (
 
       for (let i = 0; i < Math.ceil(totalItems / batchSize); i++) {
         batches[i] = Lbry.claim_search({
-          claim_ids: claim.value.claims,
+          claim_ids: claim.value.claims.slice(i * batchSize, (i + 1) * batchSize),
-          page: i + 1,
+          page: 1,
           page_size: batchSize,
           no_totals: true,
         });