Show the right username in the confirmation for removing articles

When the "remove article" link is clicked in the student table,
show the name of the student in the pop confirmation dialog as
intended, instead of the username of the user doing the removal.

Bug: 61949
Change-Id: I153818cbd7a050c51aa682c3f8ce3579cf746ecd
Merge "Show the right username in the confirmation for removing articles"