To Reproduce
Steps to reproduce the behavior:

1. Subset app, iloc method.
2. Select a dataframe with more than 20 rows.
3. Scroll down at least once.
4. Click the "Add All" button.
5. Click the "Del All" button again.

Describe the bug

1. Clicking the "Add All" button once moves all items, but they still remain in the left box. Clicking it twice moves the next 10 items that were not visible due to scrolling, resulting in duplicate items.

2. After clicking "Add All," clicking "Del All" displays the items without proper sorting.

Expected behavior

• Clicking the "Add All" button should move all items to the right box and remove them from the left box.
• Clicking the "Del All" button again should display the originally sorted items on the left.

Screenshots

Desktop (please complete the following information):

• OS: Windows 10
• Browser chrome