how to hide custom toolbar buttons for a particular project area
One answer
Congratulations.
No, to my knowledge there is no mechanism to hide UI parts based on project areas. There is also no place to configure something like this.
If you add custom stuff and want to configure custom behavior for it, you have to come up with the custom behavior yourself. If a UI element lives in a work item editor presentation, it will be able to access the work items data somehow and could then decide to show or not.
If you add custom stuff and want to configure custom behavior for it, you have to come up with the custom behavior yourself. If a UI element lives in a work item editor presentation, it will be able to access the work items data somehow and could then decide to show or not.