Customizable flags

The goal of flags is to create customized checkboxes that can be linked to multiple segments of the software. 

The different segments are 

1. Person: Any flag that you want to set for each guest profile in the software. (E. G. ID checked)
2. Project: Any flag that you want to set for each reservation in the software. (E. G. digital package send) 
3. Product: Any flag that you want to set for each product in the software. (E. G. available for bulk sales)
4. Project person: Any flag that you want to set for each guest of a reservation profile in the software. (not yet implemented)
5. Rental object: Any flag that you want to set for each vehicle in the software. (E. G. Purchased new)
6. Document: (not yet implemented)
7. Rental Part: Any flag that you want to set for each vehicle part in the software. (E. G. Trial product)
8. Marketing: (not yet implemented)
9. Allergens: Any flag that you want to set for each order to point out allergens in the comments. (E. G. Gluten-free)