Add configurable limit to entity node reference

Problem/Motivation

Since there's a problem in entity reference if views is used to limit the nodes, "node cannot be referenced", we have to limit referenced nodes because like in my case I have 50,000+ nodes in one content type, if I use that as check box or select list it will be out of memory

Steps to reproduce

You need 10 thousand or more of nodes in 1 content type, configure that as referenced entity, make that into a list or checkboxes

Proposed resolution

Add a configurable limit variable in the settings, or better if we'll have a pager.