Love the new backend search functionality. However there doesn't appear to be an easy way to clear custom field searches. Tried the clear button at top of list and that clears ordinary search box, but there doesn't appear to be a way to clear custom searches without manually changing each field or going to another page and back. Am I missing something?

Also, is there a way of picking empty field? That is to find all the users where a particular field contains no value?

These are small niggles, the new functionality, the backend export and the backend import are fantastic.