lowell!

The dialog comes up when a file has the `com.apple.quarantine` extended attribute. The `-cr` options to `attr` recursively clears all extended attributes from the specified app bundle.

@ujell you were on the right track - it doesn't crash if `EditViewController` inherits from `NCWidgetListViewController` instead of `NCWidgetSearchViewController`. I still haven't spent any time working with app extensions, so...