I'm customizing the CSS file to help blend Mantis into my existing site theme, with a dark background. Anyhow, there is no class associated with the heading for the "Issue Status Percentage" table, so I had to modify the html_api.php file and include a class name. I used the "form-title" class to match the style of the other boxes on the "My View" page.

This change will be lost in an upgrade. I recommend specifying a class name in the html_api.php file for this table, to make customization easier for users and persistent across upgrades.