Set the default importance of a task based on folder/project

We use the Importance field (High/Normal/Low) to distinguish the priority of certain tasks. The default level is Normal.

Is there a way (workflow/automation?) to make any new tasks created in a particular folder or project to have the Importance set to High automatically? 

This is similar but different to Setting importance / priority at the project level which is about adding the Importance field at the Project/Folder level. Having said that, a good usability improvement would be to add this field to the Project level, and have any tasks underneath inherit the Project level by default (while also allowing it to be changed per task as required).