implemented rewriting of "… (from <sender>)" in subject, prepared open flag

static/templates/inspect.st

@@ -23,6 +23,10 @@
                     <input type="checkbox" name="reply_to_list">
                     Set list adddress in "ReplyTo" header
                 </label>
+                <label>
+                    <input type="checkbox" name="open">
+                    Allow non-members to send mails via list (Danger!)
+                </label>
                 <label>
                     <input type="checkbox" name="forward_attached">
                     Append original message as attachment

static/templates/js.st

@@ -61,6 +61,7 @@ function showListDetail(data){
     if (data.forward_attached) $('input[name="forward_attached"]').prop('checked',true);
     if (data.hide_receivers) $('input[name="hide_receivers"]').prop('checked',true);
     if (data.reply_to_list) $('input[name="reply_to_list"]').prop('checked',true);
+    if (data.open) $('input[name="open"]').prop('checked',true);
 }
 
 function showListOfEditableLists(data){