Sub-cards?

[Grunthos]

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Is your feature request related to a problem? Please describe.

Sometimes is is nice to have a taks broken into sub-tasks, each with dues dates and notes etc.

Describe the solution you'd like

The ability to link cards hierarchically, eg.

Migrate to new ISP:

• Move DNS
• Move mail
• Move Web Server
• Decommission old server

One might argue that this is a 'project', but one might need a third level of hierarchy: Move Mail

• Select shortlisy of new storage backend candidates
• test backed performance
• select final candidate
• configure and test migration script for new backend

etc

Describe alternatives you've considered

It seems that one needs a structure like:

Board
   List
      Card
         List...

** Additional Notes **

Kanban has the concept of subcards, but I think sub-lists might work a little better.