[KBM] Allow for "typed" item to trigger shortcut

[realzzl]

关于加强组合键功能的建议
更加自由的组合按键，在其他应用甚至游戏中可以使用。

比如，连续按两次A，代表以下依次按下了ASDFGHJ
连续按两次D，代表依次按下了↑↓←→

以下是Google翻译给的文字

Suggestions on strengthening the function of combination keys
More free combination of buttons can be used in other applications and even games.

For example, pressing A twice in succession means pressing ASDFGHJ in turn
Press D twice in succession, it means press ↑↓←→

[realzzl]

定义连续按键代表什么功能

[crutkas]

I would group this in with the key cord stuff but honestly, i'm very wary of allowing non-cord style execution like this.

#6976 would be tracking item