[API BUG] sys_requestAccounts method never resolves if user cancels

### What happened?

When calling pali.request({ method: "sys_requestAccounts" }) if the user closes the extension or clicks "cancel" the Promise is not resolved. Please add a reject in the case that this happens.

### Version

3.4.0

### What platform are you using?

Windows

### What browser are you using?

Firefox

### Is this a trezor issue?

No

### Relevant log output

```shell

```