Function keys don't work in terminal in WSL

[traversc]

• VSCode Version: 1.15.0
• OS Version: Windows 10

Settings:

{
    "terminal.integrated.commandsToSkipShell": []
}

Extensions: none

Steps to Reproduce:

1. Open a new terminal
2. Load bash
3. Press any function key F1-F12

A tilde is inserted rather than passing the function key to the terminal.

Edit: I found a previous workaround based on a similar issue, suggesting to use wsltty, but it doesn't work perfectly either. #10163

[Tyriar]

This is likely related to winpty, tracking in #45693