- Use read_group to compute task_count of res.partner
for performance sake
- When creating a task/issue from partner form view,
the default partner will be the current one (event if
the use case is rare)
- Only display button when count is greater than 0
- Also avoid default 'My Tasks' filter when coming from
partner form view
A new view is dedicated for that kanban view. It is based on the standard
issue kanban view but using the group_create=false attribute to disable
the ability to create new columns.
It is done using a different view because standard issue kanban view
requires this ability. However it is not possible to achieve that goal
using conditional attributes.