Reordering multi site

[jkhwsd]

Bug Description

When reordering an orderable collection (max_depth: 1) with a multi site setup, all entires in the collection are fetched without a filter for the active site.

This again causes an error when saving the reordering, and afterwards all pages fail.

How to Reproduce

From a fresh installation:

1. Make site a multi-site
2. Create a new collection
3. Configure the collection to be orderable, max depth: 1, and enable it for both sites
4. Create two entries and enable them for both sites
   • The error can even be triggered with a single entry enabled for both sites
5. Click "Reorder"
   • Here all 4 entries are shown
6. Click "Save order"
   • An error happens

Extra Detail

After the reorder the collection tree looks something like this:

  tree:
    default:
      - {  }
      - {  }
      -
        entry: ff26cab9-b2c6-42e3-be94-27d7c800bd47
      -
        entry: 7155ec97-416b-431a-a122-7043f0b3f7e0
    other: {  }

So it appears as if only the id's for the active site is inserted.

Environment

Statamic version: v3.0.0-beta.28

PHP version: 7.4

Install method (choose one): Fresh install from statamic/statamic