Kanban style tasks list

[pierrelegall]

Kanban board is very efficient for focus and taking action compared to a classic todo list for many people, and it's a standard today (see the success of Trello and all the platforms implementing it then).

The proposal is to optionally extend the "Order by" features to allow kanban style list.

The board can be applied vertically to be simpler to implement and to fit with a phone use.

UI example:

My thought about an implentation:

• extending the tasks status from completed or not to a (customizable) set of "Done", "In Progress" and "To do", "Log"
• allowing to order by status, respecting the user set/predefined order
• allowing to show status name headers in the tasks list, helping focus
• allowing to reorder tasks manually in each columns (see #147), this is important in the kanban methodology to order your next actions order
• adapting the show or not the "Done" feature to this new system