Bug 10432 - Display of enabled status on course list is not accessible

The list of courses in Course Reserves uses an image with no alt
attribute to display the enabled/disabled status of each course. This is
not accessible or valid HTML.

This patch removes the image altogether in favor of a simple "Yes" or
"No." To test, view the list of existing course reserves. Enabled and
disabled courses should show "yes" or "no" in the "Enabled" column.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>