Improve how "disable behavior" works.

[klutt]

Sometimes I want to add a site permanently and sometimes I want to add them temporarily. I know that I can switch between these by changing "disable behavior" to either "by domain" or "by tab". But this is not very convenient. My solutions are so far:

1. Use disable by domain, grant the new site js access and then remove it from the list
2. Open the new site in a private window
3. Use disable by tab and manually toggle the switch every time I visit a site that requires js

None of these are suitable. 1 requires me to remember to do precisely that extra thing. Apart from the reisk of forgetting, it feels like an unnecessarily clunky way to solve it. 2 kind of defeats the purpose with having a toggle switch at all. And 3 makes it very inconvenient to browse those sites I trust.

I assume that the easiest way to solve this is to add an option to allow the domain list to be active while using the "by tab" option.

Otherwise, great job! This plugin reduced the memory and cpu usage by a great deal.