Feature Request : Allow searching and sorting popup entity selectors

We are using popup entity selectors heavily but there isn't any search or sorting feature on the right-hand side of these popups.

Could you please add this minor but life-changing feature into your road map ? 

And it would be very helpful if you make these popups resizable? 
They are static and couldn't see all items easily.

- SEARCHING
- SORTING
- RESIZABLE

are crucial/fundamental features for all of the popups.