Nucleotide presets: Creating preset with the same component codes replaces properties of the existing preset

[MarinaKisacik]

Found while testing #8857

Steps to reproduce:

1. Create Preset A in the Monomer Creation wizard with specific component codes (e.g., Base='HB1', Sugar='HS1', Phosphate='HP1')
2. Create Preset B in the Monomer Creation wizard with the same values as in Preset A (HB1, HS1, HP1) for the component codes
3. Observe Preset A and Preset B in the library

Actual Result:
Preset B does not appear in the library. Instead, the properties of Preset A are updated

Preset.with.the.same.component.codes.mp4

Expected Result:
Both Preset A and Preset B are listed in the library as separate entries, each with the same component codes

Refer to BA confirmation

Found in Environment:

• Ketcher Version 3.14.0-rc.1 Build at 2026-03-02; 15:10:01
• Indigo Version 1.42.0-rc.1.0-g7b8e9cfc9-wasm32-wasm-clang-19.0.0
• Chrome Version 146.0.7680.31 (Official Build) (64-bit)
• Win11