Option to choose what happens when you go to blocked site

[AsciiJakob]

Easy way to make it more versatile while also keeping it simple. Though, it's easy to get into bloat territory here, so have to be careful.

Note: haven't decided on any of these yet, except maybe "go to custom URL" Example alternatives:

• Block the page
• Go to custom URL
• Wait five seconds
• Close tab and give notification