I am looking for a way to show all post tags on post edit screen/tags sidebox in WordPress admin section. By default WordPress shows 45 most used tags but I need a way to list all tags there or at least increase this limit.
I found similar question here Showing all tags in admin -> edit post. But it suggests to edit/modify WordPress core files which is not what I really want. Because upgrading WordPress will be a huge problem then.
I also could not find anything in Google search. So is there are way to list all or more than 45 tags on post edit page.