Add buttons in "Edit Access" should move focus to the inserted row

[Jono M]

When sharing a page or collection (/view/access.php) the various Add buttons add a new row into the access table with Javascript, but for screen reader users who can't see the inserted row there is no indication that this has happened.
To make this more accessible, focus should be set to the new table row (or the first input in that row) when any Add button is pressed.

Affects latest master

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/2985

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/2985
Committed: http://gitorious.org/mahara/mahara/commit/83ff69713908e84d1882f332c635bc61676dec53
Submitter: Son Nguyen (<email address hidden>)
Branch: master

commit 83ff69713908e84d1882f332c635bc61676dec53
Author: Jono Mingard <email address hidden>
Date: Tue Feb 4 17:13:56 2014 +1300

Use focus management in Edit access table (Bug #1262899)

Add buttons now set focus to the first input in the first added row.
These inputs have been given descriptive labels. Delete buttons set
focus to the entire table (or the table showing that no one has
access).

Change-Id: Ie04c46673395658b5d6a39b29306de456ae37d81
Signed-off-by: Jono Mingard <email address hidden>