I agree.  I couldn't figure out where to put this.  I could give it a heading of its own (like I did for Field Tracker) or rename "Fields" to "Choices & Fields".

I initially planned to group all status/choice-related items, but that left me with a miscellaneous list of other field, model, and manager classes.  I chose the separation of fields, models, and managers after noticing that possible grouping.