Thanks for the sample.
I understand the logic to implement custom context menu with different actions. Now, the question is, there is a property taskAction which if true, it shows a setting icon in each card. Can we show this custom context menu rather than in-built list when that setting icon has been clicked?
Tried to explain such scenario in a mockup image. You can see my mockup image here: https://ibb.co/d6SJFfN
As you can see in this mockup, grouped those four columns in three phases and all phases are in a single column. its an example but we could have any numbers of roots and sub-columns and swimlanes are only after last level column.