Issue Type: Bug

I think this changed somwhere in January (I don't think I've noticed it in late December).

Steps to repoduce:

1. Open Keyboard Shortcuts editor
2. Find shortcut without when expression (e.g. workbench.action.closeActiveEditor)
3. Right click and select "Change When Expression"
4. Add when expression (e.g. editorTextFocus) and save it
5. Shortcut is removed from filtered results and doesn't work when cursor is in editor.

Root cause is that Change When Expression creates 2 records in keybindings.json:

{
    "key": "ctrl+w",
    "command": "workbench.action.closeActiveEditor",
    "when": "editorTextFocus"
},
{
    "key": "ctrl+w",
    "command": "-workbench.action.closeActiveEditor"
}

and lately "command": "-commandIdЭ without when removes all keybindings without taking when into account.
Swithing order of these objects restores expected behavior.

Looks like this doesn't happen if keybinding already had when expression. For example next change displayed in list as expected

{
    "key": "escape",
    "command": "editor.debug.action.closeExceptionWidget",
    "when": "exceptionWidgetVisible && editorTextFocus"
},
{
    "key": "escape",
    "command": "-editor.debug.action.closeExceptionWidget",
    "when": "exceptionWidgetVisible"
},

VS Code version: Code - Insiders 1.64.0-insider (3dda6ea, 2022-01-27T05:15:00.564Z)
OS version: Windows_NT x64 10.0.19041
Restricted Mode: No