"Crl-b" is broken when Emacs keybinding is selected

[mjbrisebois]

Is this a hackmd.io issue?

• [x] Yes, the bug happens on https://hackmd.io
• [ ] No. If it's a self-hosted CodiMD instance, please fire up the issue in the repo of CodiMD: https://github.com/hackmdio/codimd

What's the problem

When using Emacs keybindings "Crl-b" should move the cursor but it executing the bold syntax "****"

Current behaviour

When using Emacs keybindings "Crl-b" should move the cursor but it executing the bold syntax "****"

Provide steps to reproduce:

1. Go to any note
2. Select Emacs for editor experience and keybindings
3. Type "Crl-b"
4. It will insert "****" instead of moving the cursor

Expected behaviour

"Crl-b" should move the cursor 1 character left

Environment

I use HackMD on:

Desktop

• OS: Ubuntu 18.04
• Browser: Chrome
• Browser Version: 84.0.4147.105

Additional context

I've been using this nearly everyday for over a year and it had proper behaviour up until today.

[mjbrisebois]

Duplicate of https://github.com/hackmdio/hackmd-io-issues/issues/197