Common spelling dictionary across services

[mjeveritt]

Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Problem Description

Each chat service has it's own dictionary .. so adding custom words/etc has to be done for each service.

Proposed Solution

Create a common spell-checker instance that works across all services.

Alternatives Considered

I can see how the Spell Checker instance is implemented 'per browser' in Electron, but not how this could potentially be extended, as I assume each Service is it's own Browser?

Additional Information

No response