Undo/Redo after deleting a sequence via right-click places it incorrectly in the sequence list

[Zhirnoff]

Description:
When a sequence is deleted using the right-click context menu, and then restored using Undo, it does not return to its original position.
Instead:
On first Undo, it appears below the first sequence.
Further Undo/Redo moves the sequence to the bottom of the list.

Steps to Reproduce

1. Create several sequences in Sequence mode.
2. Right-click on a first sequence and select Delete.
3. Press Undo.
4. Observe the restored sequence is not in its original position.
5. Press Redo and Undo again — sequence keeps moving downward.

Actual behavior
Sequence is placed incorrectly in the list — first below the top sequence, then at the bottom.

Expected behavior
The sequence should be restored exactly where it was before deletion.

Videos

2025-04-03_12h05_38.mp4

Desktop:

• OS: Windows 11
• Browser Chrome
• Version 133.0.6943.127 (Official Build) (64-bit)

Ketcher version
[Version 3.3.0-rc.1]
Indigo version
[Version 1.31.0-rc.1]

This bug was found while testing: #6472