Wrong error message if three-letter sequence code haven't been recognized

[AlexeyGirin]

Steps to Reproduce

1. Go to Macro - Flex mode
2. Load using Paste from clipboard way: Ads
   

Actual behavior
System throws an error: Unsupported symbols: Convert error! Given string could not be loaded as (query or plain) molecule or reaction, see the error messages

Expected behavior
System throws an error: Invalid Sequence: Given string cannot be interpreted as a valid three letter sequence.

As per requirement:

1.8. Every triplet of letters in the sequence (that has the first letter uppercase and others lowercase - requirement 1.6) should be interpreted as an amino acid using the table above.

1.9. If requirement 1.8. in not fulfilled an error message should appear, with a title "Invalid Sequence" and text "Given string cannot be interpreted as a valid three letter sequence."

AlaAsxAspAdsAsnArg is invalid because Ads does not correspond to any amino acid from the table above.

Versions

• Ketcher Version 2.27.0-rc.1 Build at 2024-11-05; 14:55:18
• Indigo Toolkit Version 1.26.0-rc.1.0-g904d2d992-wasm32-wasm-clang-19.0.0
• Chrome Version 130.0.6723.117 (Official Build) (64-bit)
• Win10

Found while testing - epam/ketcher#5556, #2472

[AlexeyGirin]

Verified.

• Ketcher Version 2.27.0-rc.2 Build at 2024-11-12; 19:26:10
• Indigo Toolkit Version 1.26.0-rc.2.0-gfec30ecd8-wasm32-wasm-clang-19.0.0
• Chrome Version 131.0.6778.70 (Official Build) (64-bit)
• Win10