Add the ability to use the new date period in the built-in Task object

Hi, as of release 71 we now have access to periods as object properties.

Date variables for object templates

Date properties on templates can use Day of creation, Week of creation, Month of creation, or Year of creation. If you create from the calendar, Day of creation uses that calendar day.

It would be great if we could assign a period to a Task object (Due date, Do date, or another one) so that we can see it when relevant while not just assigning it to a day and postponing it.

For instance, some tasks are to be done this week without specific day and would benefit from such a thing. The current workaround being assigning it to monday and delaying it until its done.