[Suggestion] Clear button should clear the selected context

[Mikey1993]

It means that if I have 3 tabs open ATM, and I pick the 2nd tab in the logger and hit the clear button, only the records from the 2nd tab will be erased, and not all the records.

This way It will help to analyze cases when an extension which sends some kind of behind-the-scene request as a tracking measure or some other kind of requests upon an activity of a user on a given page and some other cases..

[Mikey1993]

Thanks!, edited the Wiki (https://github.com/gorhill/uBlock/wiki/The-logger).