User should be able to edit tasks associated with an issue ticket

[kellymorin]

Given a user is authenticated
When the user is viewing a issue ticket detail view
Then the user should be able to view all tasks associated with the ticket
And they should be given an affordance to edit the details of each related task

When the user selects the option to edit task details
Then they should be presented with a form, that is pre-populated with existing task data, where they can update information about the task such as name, description, status and assigned team member

When the user submits the form
If the data is valid, they will be taken back to the ticket detail page with the related task updated completed
If the data is not valid, they will be shown an error message on the form and asked to supply valid data