Project Priority - add to project header customization list

Description - Add "Project Priority" field to the items that can be customized to project header 

Why is this feature important to you -  Easy way for project team to see the priority at a glance

How would you like the feature to work - I love that you can now customize what is on the project header, just wishing this was one of the items that coudl be added and edited from there. 

Current Behaviour - Project priority field is not able to be added to the project header.