Atom Query feature export: System lost MOST "Ring bond count" values - 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 Add support for query features in MOL, SDF and RXN formats (Marvin extension) Indigo#1440

Describe the bug
System lost MOST "Ring bond count" values

Steps to Reproduce

1. Open from file: Ring bond count2.zip
2. Save it to Molfile file format
3. Clear canvas
4. Load from Molfile file format

Actual behavior
System losts most "Ring bond count" features

Expected behavior
System doesn't lost "Ring bond count" features

Note
problem is in v2000.js only first occurrence are set

       if (!props.get('ringBondCount')) {
          props.set('ringBondCount', sGroup.readKeyValuePairs(propertyData));
        }

[AlexeyGirin]

Moved to Refined Backlog since no fix over 4 versions