Remaining chat widget bugs

[eyurtsev]

The chat widget still fails to keep track of history in some cases:

Resulting in things that look like this:

Examples to check:

• chat_with_persistence
• tuples example for the chat_message chain which returns function call messages

[jlev]

something changed between 0.0.44 and 0.0.46 that is causing the playground to render blank history for me when using agents which call open ai functions