Small language file additions and changes for new friends screen. More to come.

htdocs/lang/en.utf8/mahara.php

@@ -532,7 +532,8 @@ $string['friendrequestrejectedsubject'] = 'Friend request rejected';
 $string['friendrequestrejectedmessage'] = '%s has rejected your friend request.';
 $string['friendrequestrejectedmessagereason'] = '%s has rejected your friend request.  Their reason was: ';
 
-$string['currentfriends'] = 'Friends';
+$string['allfriends']     = 'All Friends';
+$string['currentfriends'] = 'Current Friends';
 $string['pendingfriends'] = 'Pending friends';
 
 $string['friendlistfailure'] = 'Failed to modify your friends list';