HTML fixes + various other improvements

Fixes & changes in this patch*;

Various fixes in HTML
More escaping of output in various pages
Make some SQL query to run only if feature is enabled (html/pages/device.inc.php)
On device health page put icon next to text (see device_health_icons attachement)
On device edit page put icon next to types in dropdown (see device_health_icon attachement)
Fix percentage background in device health memory and storage pages
Fix entity popup and processor description in device inventory page
Fix entity popup in device health processor & storage page

• may have forgotten to list something