add context menu option to blacklist / whitelist website
lib/scripts/eventPage.js
contains the context menu IDs blacklistWebsite
and whitelistWebsite
but the context menu options for them have not been created.
Currently when we right click on a page without selecting anything we get an empty context menu that does nothing, illustrated by the image below:
Options to blacklist websites or whitelist websites that have already been blacklisted should be added to the context menu.