Hyper modifier is unknown

- VSCode Version: 1.35.1 - OS Version: Ubuntu 18.04.0 LTS Steps to Reproduce: 1. Rebind any key to Hyper (Mod3) 2. Try to create shortcuts Hyper + Key I bind **Caps Lock** to be working as **Hyper** modifier (**Mod3**). And wanted to use that in VS Code shortcuts. But whenever I press **Caps Lock** in "Change Keybinding" dialog it is not recognized as modifier. <!-- Launch with `code --disable-extensions` to check. --> Does this issue occur when all extensions are disabled? Yes