🔀 fix: Address Convo/Preset Switching Issues

[danny-avila]

Summary

• Addressed Mentions not using active index when cycling through mention items
• Correctly navigate to new conversation when deleting/archiving a new, active convo
• Ensure openAI/custom/gptPlugins presets only have one label value present (chatGptLabel), despite two different fields (chatGptLabel and modelLabel being interchangeable)
  • This issue would prevent "presets" from correctly taking effect or saving the correct label value when they are available along with "modelSpecs"
• Handle Error display issue when enforceModelSpecs correctly blocks a request for an existing conversation

Change Type

• Bug fix (non-breaking change which fixes an issue)

Testing

Manual tests, will soon add E2E tests

Checklist

• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• I have commented in any complex areas of my code
• I have made pertinent documentation changes
• My changes do not introduce new warnings
• I have written tests demonstrating that my changes are effective or that my feature works
• Local unit tests pass with my changes
• Any changes dependent on mine have been merged and published in downstream modules.
• A pull request for updating the documentation has been submitted.