how to display column headers for subtasks in JIRA 4.3.4

[Raja Choudhary]

1) How could I add column headers (Ttitles) for the list of sub-tasks?

2) How can I make those deaders sortable?

3) Why ONLY progress filed is not appearing in my newly installed JIRA whereas other fields are. I have following entry in jira-application.properties file:

jira.table.cols.subtasks = issuetype, status, assignee, created, progress, duedate

[Raja Choudhary]

I added these two lines in \jira\webapp\includes\panels\issue\view_subtaskissues.jsp page and headers and sortable links appeared.

layout.setDisplayHeader(true);
layout.setSortingEnabled(true);

Now the issue is when I click on any of the headers to sort, page is being forwarded to the project level issues with that sort.

Is there any way by which sorting can happen within sub-view and whole page does not get forwarded?