Paste from cllipboard to obey system defaults

### Prerequisites

- [x] I am running the latest version of ComfyUI
- [x] I have custom nodes enabled

### What happened?

For left handed users, by system default we could press Ctrl + Insert to copy, and Shift + Insert to paste. But in ComfyUI Shift + Insert (paste) does not work on nodes. Note Ctrl + Insert (copy) does work.

Its an annoying :(

I have default clipspace. Windows 11

### Steps to Reproduce

1. Click a node.
2. Ctrl + Insert ✅ Copy
3. Shift + Insert ❌ Paste

### How is this affecting you?

Minor inconvenience

### ComfyUI Frontend Version

1.39.19

### Browser

Chrome/Chromium

### Console Errors

```javascript

```

### Logs

```shell

```

### Additional Context

_No response_