Feature requests

Hi there 🙂 I am still loving your plugin, but I am starting to get scalability issues.

Firstly, I have over 100 posts in draft status. WP_Query, when used in the backend, by default includes draft posts, and this means often I cannot find the actual posts I want to associate to the post I am editing, due to 1. those draft posts being shown, and also, the limit of 10 posts in the pick list. I have fixed this in my own site, by adding ‘post_type’ = ‘publish’ to the ajax id look up function, and by increasing the per page limit to 20. I suggest you add an option to only show published posts in the metabox. Sometimes it is useful to show the draft posts, and pre-load them in advance of publication. Similarly it would be nice to set that default for per_post in settings.