[Feature Request] Grouping Tags

[Kitzune]

I would like a function to manually group tags in specific groups and subgroups.
Maybe even with an indicator what groups and Tags are used for the selected image.
Indicator [ ] no tag or group selected, [-] some tag or group selected, [x] all tag or group secleced

example:

• [-]Body
  • [-]Fur
    • [-]Color
      • [ ]red
      • [x]**black**
  • [ ]Torso
    • [ ]Limbs
      • [ ]Arms
        • [ ]Hands
        • [ ]4 Finger
        • [ ]5 Finger