Add view as a sub-view

Views can get busy and before long you’ve got 10 or more views and they get disorganised. I’d like to see the ability to add a view as a dropdown under another view, eg:

Kanbans ▾

  • Project Stages
  • Task Types
  • Status

Inactive ▾

  • Cancelled Tasks
  • On Hold
  • Archived

This way views are uncluttered and more organised.