User Picture tooltips only show in Internet Explorer

Because only Internet Explorer displays tooltips using the 'alt' tag, all other browsers are missing out on the display picture description. The easy fix is to also add a 'title' tag to images to the userpics in addidtion to the 'alt' tag.

Line 4457 in moodle\lib\weblib.php just needs to go from:
$output .= "<img class=\"$class\" src=\"$src\" height=\"$size\" width=\"$size\" alt=\"".s($imagealt).'" />';

to:
$output .= "<img class=\"$class\" src=\"$src\" height=\"$size\" width=\"$size\" title=\"".s($imagealt)."\" alt=\"".s($imagealt).'" />';

This is definitely not a big issue but is one that can be very quickly fixed. I don't know where else this might be an issue!

Josh Lukins