Replace monomer from library at view mode goes wrong for all types of monomer converded to @ symbol

[AlexeyGirin]

NOTE: Common problem with all types of monomers wrapped into @ symbol on sequence mode

Steps to Reproduce

1. Go to Macromolecules mode - Flex mode
2. Load from file: Replace monomer from library at view mode goes wrong.zip
   
3. Go to Sequence mode
4. Select last to symbols and click on C monomer from Peptide tab at Library
   
5. Press Yes in appeared "Confirm Your Action" dialog

Actual behavior
System made a cycled chain (What? Yes!)

Expected behavior
A peptide and all CHEMs replaced with C peptide

As per requirement:

.....4.2. If any of the selected symbols is @ (and it represents more that one monomer), modal window with a warning message should appear. Warning message: "Symbol @ can represent multiple monomers, all of them are going to be replaced. Do you want to proceed?".
..........4.2.1. "Yes" option -> all selected monomer(s) on canvas are replaced.
(Images for better understanding)

Go to sequence mode, select A and @:

Click on C in the library, "Yes" in the modal window:

Versions

• Ketcher Version 2.24.0-rc.1 Build at 2024-08-06; 19:17:47
• Indigo Toolkit Version 1.23.0-rc.1.0-g85f89b8f5-wasm32-wasm-clang-19.0.0
• Windows 10 Pro
• Chrome Version 127.0.6533.100 (Official Build) (64-bit)

Related issue - #4878