First column in Inbox should have a hidden header

[Jono M]

When in the Inbox (/account/activity/index.php) the first column of the main table contains only the message icons and therefore has no text in its column header. For screen reader users any table column without a textual header is somewhat confusing so hidden "Message icon" text should be added to the column header.

Affects latest master

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/2931

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/2931
Committed: http://gitorious.org/mahara/mahara/commit/59c4b0424380bace05c31e54f477ce9f7a9e97ce
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit 59c4b0424380bace05c31e54f477ce9f7a9e97ce
Author: logan walker <email address hidden>
Date: Wed Jan 15 16:22:54 2014 +1300

Bug #1262477 First column in Inbox should have a hidden header been added

Change-Id: Iab19f206b0f5bc46ff5d9f41b91cb08af6b79f51
Signed-off-by: logan walker <email address hidden>