Show story points column for sub-tasks on issue view

Problem definition:

There is no way to show the story points column for sub-tasks on issue view.

Suggested Solution:

A column that allows users to see the story points of a sub-task.

Why is this important:

The process to know the total of story points of an issue would consume less time if the sub-tasks show a column with their story points.

Workaround:

Open the sub-tasks one-by-one to see their story points.