That's why it never takes from your quickbar, and only your main inventory.
In the start, keep boxes and poles in your quickbar.
Doing it this way just helps significantly in several ways;
- It makes the code much smaller, and easier to maintain
- Reduces the complexity of the mod for the user
- Makes the transition from wood boxes and poles to higher level items easier automatic, if you just move them out of your quickbar at the point where you want to start discarding them, using them as fuel for your car/whatever.
Does that make sense?
If you still feel like you really want some way to configure it, please reply and we can see what we can do - maybe a slash command or something would be enough. But frankly I think the quickbar solution is already enough.