Ctrl + Backspace key combo doesn't work in the embedded terminal emulator

`Ctrl + Backspace` key combo doesn't work properly in the embedded terminal emulator, which causes backward delete word to no longer work in PowerShell.

Use this command to test key presses in PowerShell:

```powershell

[System.Console]::ReadKey($true)

```

When using fish shell (WSL2) inside Qt Creator, it is interpreted as `\e[127\;5u`. When using fish shell inside Windows Terminal, it's interpreted as '\b`. Use this command to test key presses in fish shell:

```fish

fish_key_reader

```