[v6] Preview view: navigation in preview view escapes iframe #7935
Description
Trying v6 on trykirby.com in Safari, I see a few problems with the preview view:
- Sometimes the preview browser iframe isn't reacting to scrolling (I assume some issues with the double iframe)
- Navigating inside the demokit doesn't load the new page inside the preview browser iframe, but navigates the whole browser window
- When typing some text in a writer field that leads to the iframe refreshing, sometimes the scroll position gets lost