MDL-34004 - reinstate the custom HTML icon as separate from other markup icons, because it usually means a "page" to most people that displays in the browser. These icons are temporary (but workable) until Barbara can put in some nice ones that work as a set. The 16px one is from Moodle 2.2 and the others are copies of "unknown".

lib/filelib.php

@@ -1404,9 +1404,9 @@ function &get_mimetypes_array() {
         'hpp'  => array ('type'=>'text/plain', 'icon'=>'sourcecode'),
         'hqx'  => array ('type'=>'application/mac-binhex40', 'icon'=>'archive', 'groups'=>array('archive'), 'string'=>'archive'),
         'htc'  => array ('type'=>'text/x-component', 'icon'=>'markup'),
-        'html' => array ('type'=>'text/html', 'icon'=>'markup', 'groups'=>array('web_file')),
+        'html' => array ('type'=>'text/html', 'icon'=>'html', 'groups'=>array('web_file')),
         'xhtml'=> array ('type'=>'application/xhtml+xml', 'icon'=>'markup', 'groups'=>array('web_file')),
-        'htm'  => array ('type'=>'text/html', 'icon'=>'markup', 'groups'=>array('web_file')),
+        'htm'  => array ('type'=>'text/html', 'icon'=>'html', 'groups'=>array('web_file')),
         'ico'  => array ('type'=>'image/vnd.microsoft.icon', 'icon'=>'image', 'groups'=>array('image'), 'string'=>'image'),
         'ics'  => array ('type'=>'text/calendar', 'icon'=>'text'),
         'isf'  => array ('type'=>'application/inspiration', 'icon'=>'isf'),