UI: Revisit the chat UI

[cwang]

Describe the bug

It crashes at times in that chat history disappears, i.e. blank.

To Reproduce
Steps to reproduce the behaviour:

1. Go to "Ask Your Documents" and then "Manage Documents" tab
2. Upload a doc or delete a doc
3. Switch back to "Ask" tab
4. You'll notice that the chat history has gone.
5. Go to another page and come back you will get the chat history back however.

Expected behaviour

Chat UI should simply function all the time.

Screenshots

Environment (please complete the following information):

• OS: MacOS + Chrome
• Code Version: 0.0.1
• Other Runtime Versions: Python 3.11

Additional context

We're using streamlit-chat which can be swapped out if needed.

[cwang]

Fixed by re-arranging the menu options. Can you double check @janaka

[janaka]

Following reproduction steps on main commit [1097b68](https://github.com/docqai/docq/commit/1097b685ef9c1791c6b7981f571f403673353861) the issue doesn't occur. Fix is good.