Atom Query feature export: System lost ALL "Implicit H count" values if only Implicit H count values set - export to Molfile

[AlexeyGirin]

Environment details (please complete the following information):

• Indigo Toolkit Version 1.18.0-dev.2.0-g369c82f8c-x86_64-linux-gnu-11.4.0
• Ketcher Version 2.17.0-rc.2 Build at 2024-01-03; 17:17:22
• Chrome Version 120.0.6099.130 (Official Build) (64-bit)
• Win10
• Issue found while testing https://github.com/epam/Indigo/issues/1440

Describe the bug System lost ALL "Implicit H count" values

Steps to Reproduce

1. Open from file: Implicit H count.zip (It contains molecules with all possible "Implicit H count" values set - from 0 to 9) (Values are not visible because of issue - https://github.com/epam/ketcher/issues/3529)
2. Save it to Molfile file format
3. Clear canvas
4. Load from Molfile file format

Actual behavior System lost ALL "Implicit H count" values and change them to Valences

Expected behavior System doesn't lost "Implicit H count" feature values

[AlexeyGirin]

Moved to Refined Backlog since not fixed over 2 releases