Search all data should search all data (including custom fields)
I should be able to quickly search the data my users and I have painstakingly entered into custom fields, without having to create a filter first.
i.e. 'Search all data' should search in custom fields and their values.
Users are familiar with search engines such as Google, and how it works. They shouldn't need to understand computer science concepts such as filters and boolean logic, to find the data they need.