Cannot Select Text in the Prompt Box.

### Describe the bug

Tested on: Copilot `v1.0.54` on Windows Terminal `1.24.11321.0`

I cannot select text in the prompt box to make any changes.
This functionality is so trivial I consider this as a bug, rather than a feature request.
This is particularly annoying when I paste some text into the prompt box.

How to reproduce:
1. Paste this sentence to the prompt box: `What are some cool C# 14 new features?`
2. Use mouse or keyboard (Ctrl + Shift) to select `some cool` and delete it. This won't work.
3. Paste the same sentence to Windows Terminal PowerShell. Try deleting `some cool` phrase using the same method as step 2. It works fine.

### Affected version

v1.0.54

### Steps to reproduce the behavior

_No response_

### Expected behavior

_No response_

### Additional context

_No response_