ScrollController is disposed when parent widget state changes

[lhengl]

Describe the bug
Setting state of the parent widget dismounts [ChatListWidget] which disposes scroll controller prematurely, causing the following error:

A ScrollController was used after being disposed.

To Reproduce
Steps to reproduce the behavior:

1. Create a ChatView inside a StatefulWidget
2. Update the state of the parent widget - for example update the state of the ChatView from loading to hasMessages and back again.
3. When the ChatListWidget gets dismounted and disposed, the scrollScroll gets disposed of, even though it still exist in the chatController, which lives rent free in the parent widget's state.

I've created a demo app to this error: https://github.com/lhengl/chatview_errors

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots

I've created a demo app to this error: https://github.com/lhengl/chatview_errors

Desktop (please complete the following information):
N/A

Smartphone (please complete the following information):

• Device: Samsung Galaxy S20
• OS: Android 13
• Browser : N/A
• Version: N/A

Additional context
N/A