Wrong sequence if sequence with cycle is saved to FASTA or Sequence file.

[NadezhdaPeskun]

Steps to Reproduce

1. Switch to Macro

2. Open file
   ketcher (modify (1)).zip

3. Try to save to FASTA of Sequence file

Actual behavior
Wrong sequence (GCG) is saved to FASTA or Sequence file instead of GGC.

Expected behavior
Sequence should be GGC as on the Canvas

please see

• New Sequences are created while we add cyclic to middle of sequence. #4575
• Undo problem while layout is changed on the Snack of Flex modes and switch through modes. #4690

Versions:
Windows 11
Chrome Version Version 123.0.6312.106 (Official Build) (64-bit)
Ketcher Version 2.21.0-rc.1 Build at 2024-04-15; 20:00:15
Indigo Toolkit Version 1.20.0-rc.1.0-g8e8ffc3c3-wasm32-wasm-clang-12.0.0

[Guch1g0v]

Fasta and sequence converts by indigo, we also need to decide whether it is necessary to somehow select the first element in the case of a cyclic sequence, if necessary, then in what way?

[AlexeyGirin]

MOved to indigo - epam/Indigo#2042