Private Sticky Posts

There are a few posts that I like to keep both private and sticky, so that when I look at my site they are always there to remind me. For example I have a “Post Ideas” post that I update as I get or finish ideas. Here’s the problem, the admin gui when editing a post only lets you select sticky if the post is public. I get around this right now by selecting private when editing the post and then quick-editing the post and selecting sticky. Works just fine till I go to edit it and then when I save it the “stickiness” is dropped and I have to add it again through the quick-edit dialog. Since both the admin and normal views seem to handle the combination of private and sticky, the restriction of sticky only to public posts seems to be enforced/required solely by the admin gui. Is that something I can easily customize or would it be difficult to change in the core?