Unclear and not really correct handling for email template settings

If a email record is added to a webform with default template used, then default template content is copied to DB and it virtually prevent changing of default template; I mean even if the default template is changed, all emails will still be sent with the previoustemplate used, until EACH email for EACH webform is opened, template is changed to "default" and then it's saved.
Also, if there are emails with custom templates set up, it could be difficult to do the above mentioned task properly, since after the defaul template changes, email template would be displayed on the email edit page as "custom", not as"default".

Here is listed a small patch that makes this situation much more clear without any breaking changes to the code. If default template is used, 'default" is saved to DB, as it's done for some other fields:

webform.js

 Drupal.webform.updateTemplate = function(context) {
   var defaultTemplate = $('#edit-templates-default').val();
   var $templateSelect = $('#webform-template-fieldset select', context);
   var $templateTextarea = $('#webform-template-fieldset textarea', context);
 
   var updateTemplateSelect = function() {
-    if ($(this).val() == defaultTemplate) {
+    var val = $(this).val();
+    if (val == '' || val == 'default') { // as a variant, may be added: || val == defaultTemplate - but I don't think it's neccessary, and it affects client browser perfomance.
       $templateSelect.val('default');
     }
     else {
       $templateSelect.val('custom');
     }
   }
 
   var updateTemplateText = function() {
     if ($(this).val() == 'default') {
-      $templateTextarea.val(defaultTemplate);
+      $templateTextarea.val('default');
+    }
+    else {
+      var val = $templateTextarea.val();
+      if (val == '' || val == 'default') {
+        $templateTextarea.val(defaultTemplate);
+      }
     }
   }
 
   $templateTextarea.keyup(updateTemplateSelect);
   $templateSelect.change(updateTemplateText);
 }

includes\webform.emails.inc

-  $default_template = theme(array('webform_mail_'. $node->nid, 'webform_mail', 'webform_mail_message'), array(), $node, 0, 'default');
-  $template = $email['template'] == 'default' ? $default_template : $email['template'];
+  $template = $email['template'];
   $form['template']['template'] = array(
     '#type' => 'textarea',
     '#rows' => max(10, min(20, count(explode("\n", $template)))),
     '#description' => theme('webform_token_help', $node),
     '#default_value' => $template,
   );
...
...
...
   // TODO: Allow easy re-use of existing templates.
   $form['templates']['#tree'] = TRUE;
+  $default_template = theme(array('webform_mail_'. $node->nid, 'webform_mail', 'webform_mail_message'), array(), $node, 0, 'default');