This PR fixes two bugs and also changes one behavior in the **Keymap
Editor**.
As shown in the video, when I press `ctrl-shift-2` in the Keymap Editor,
the first keystroke is displayed as `ctrl-shift-@`, which is incorrect.
On macOS and Linux, it should be `ctrl-@`.
https://github.com/user-attachments/assets/69cfcfa0-b422-45d6-8e69-80f8608180fd
Also, after pressing `ctrl-shift-2` and then releasing `2` and `ctrl`, a
`shift` keystroke was incorrectly added.
https://github.com/user-attachments/assets/892124fd-847d-4fde-9b20-a27ba49ac934
Now, when you enter a sequence like `+ctrl+alt-alt+f` in the Keymap
Editor, it will output `ctrl-f` instead of `ctrl-alt-f`, matching VS
Code’s behavior.
Release Notes:
- Fixed incorrect keystroke reporting in the Keymap Editor.
张小白
38e5c8fb66