Negating scriptlets completely or regardless of its arguments is not supported

## Negating regardless of its arguments is not supported

```
example.org,example.com#%#//scriptlet("abort-on-property-read", "alert")
example.com#@%#//scriptlet("abort-on-property-read")
```

* Expected result: the scriptlet is negated on `example.com`
* Actual result: the scriptlet is not negated

## Disable all scriptlets for domain

```
example.org,example.com#%#//scriptlet("abort-on-property-read", "alert")
example.com#@%#//scriptlet()
```

* Expected result: all scriptlets are disabled on `example.com`
* Actual result: the scriptlets still work