Enable live search from the advanced search menu.
Disable filetest 'access' on Mac - it's not compatible with older
versions.
Some tweaks to the live search

- don't hide the menu when the focus goes back to text input
- make the menu slightly wider
Add more prefs to the browse page cache key - they can all influence the
result of the browse pages.
Merge branch 'public/7.9' into public/feature/extended-browse-modes