Fix history limit

[MarcMcIntosh]

Pull Request Title

Description

The history limit was not being imposed, allowing the chat to go over 100 items.

It seems to be an issue with the reducer either mutating the proxy object or returning a different state object.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactoring (no functional changes, only code improvements)
• Documentation update

How to Test

• Step 1: checkout alpha, Make a lot of chats. more than 100. (checking redux for the number of entries)
• Step 2: checkout this branch.
• Step 3: Ask a question.
• Step 4: The number of save chat should be 100.

Screenshots (if applicable)

Checklist

• My code follows the code style of this project.
• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.
• I have updated the documentation where necessary.

Linked Issues

https://refact.fibery.io/Software_Development/Week1209-by-state-420#Task/Limit-chat-history,-too-slow!-506

Additional Notes

[alashchev17]

LGTM :)