Feature request: tag list in MS To Do

I love the tags in To Do. Use them to tag people, projects, anything.

Idea:
It would be great to have a dynamic list of all tags used (with number of open to do's) for example below the To Do lists (on the left side on pc client e.g.). Or as separe view even. Sorted by most open to do's)

Would help open the lidt of to do's from the boss for example :)

Thanks for considering