closes #3818

set the value saved to empty string if the email is identical to
original
this causes the original to be used since empty string is falsy

public/src/admin/settings/email.js

@@ -34,16 +34,23 @@ define('admin/settings/email', ['admin/settings'], function(settings) {
 		emailEditor.setTheme("ace/theme/twilight");
 		emailEditor.getSession().setMode("ace/mode/html");
 
-		emailEditor.on('change', function(event) {
-		    $('#email-editor-holder').val(emailEditor.getValue());
+		emailEditor.on('change', function() {
+			var emailPath = $('#email-editor-selector').val();
+			var original;
+			ajaxify.data.emails.forEach(function(email) {
+				if (email.path === emailPath) {
+					original = email.original;
+				}
+			});
+			var newEmail = emailEditor.getValue();
+			$('#email-editor-holder').val(newEmail !== original ? newEmail : '');
 		});
 
 		$('button[data-action="email.revert"]').off('click').on('click', function() {
 			ajaxify.data.emails.forEach(function(email) {
 				if (email.path === $('#email-editor-selector').val()) {
 					emailEditor.getSession().setValue(email.original);
-					$('#email-editor-holder')
-						.val(email.original);
+					$('#email-editor-holder').val('');
 				}
 			});
 		});
@@ -56,7 +63,7 @@ define('admin/settings/email', ['admin/settings'], function(settings) {
 			if (email.path === $('#email-editor-selector').val()) {
 				emailEditor.getSession().setValue(email.text);
 				$('#email-editor-holder')
-					.val(email.text)
+					.val(email.text !== email.original ? email.text : '')
 					.attr('data-field', 'email:custom:' + email.path);
 			}
 		});

src/controllers/admin/settings.js

@@ -19,9 +19,9 @@ settingsController.get = function(req, res, next) {
 
 
 function renderEmail(req, res, next) {
-	var fs = require('fs'),
-		path = require('path'),
-		utils = require('../../../public/src/utils');
+	var fs = require('fs');
+	var path = require('path');
+	var utils = require('../../../public/src/utils');
 
 	var emailsPath = path.join(__dirname, '../../../public/templates/emails');
 	utils.walk(emailsPath, function(err, emails) {