Quick search can not set subasset info field with drag n drop

Repro steps:
- Open project scene file
- Select SpriteBug object
- OpenSearch window
- Select current project search filter
- Try drag n drop CurrencyAtlas_1 or _2 into SpriteBug/SpriteRenderer/Sprite field or try to set CurrencyAtlas_1 or _2 through SquickSearchObjectPicker

Result: Cannot drag item
Expected: The subasset should be draggable and not only the main asset container.