I have prepared a single Tiddler with few macros to do part of the job!
To see how it works
3. create a new tiddler and see the plus button below the tags bar!
4. click and choose from list (click the checkbox)
You can simply add more categories and there is a lot of possibility! I just used a macro to define my selected tags just for the sake of demonstration!
Question:
1. The position of the button is not good and the created UI is ugly!
2. How to improve this?
3. Can we integrate with the current tagging UI in edit mode without touching the core tiddlers?