Scrim disables scrolling bar

[HansKristianVikOlsen]

1. go here https://eds-storybook-react.azurewebsites.net/?path=/docs/feedback-scrim--default
2. make sure you have a scrollbar by minimizing screen
3. Click "Trigger scrim" button
4. Click esc to cancel scrim
5. Scroll bar is now gone!
6. Have to refresh page to get it back

This is also happens in our app

[oddvernes]

Found the problem. We temporarily store the original overflow value of body before adding overflow hidden when opening scrim, but after a refactor, this value gets accidentally overwritten again with the new overflow value. I have added a fix so it does not get overwritten, will be in the next release!