Subquery block missing support for drag and drop

### Description of the bug

While the Move Post button is available within a Subquery block, it is not possible to move the post within a Subquery only to positions in the Query block.

### Steps To Reproduce

1. Create a new Query block with a nested Subquery block.
2. Pin a post within the Subquery block.
3. Attempt to Move Post to a new position. Only positions in the Query block are available.

### Additional Information

Example code for creating Query with Subquery

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