Ack, Sorry, I misread the second part of the question (and status already appears in the issue view by default)
There's no way to display the sub-task status in the issue navigator because the issue navigator displays a list of issues.
There are some plugins which might help you show the list of sub-tasks (and hence their status), but I've not really seen a good way to do it, especially when an issue has more than a few sub-tasks.
Hey Atlassian Community! Today we are launching a bunch of customer stories about the amazing work teams, like Dropbox and Twilio, are doing with Jira. You can check out the stories here. The thi...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG