password inputs should reflect errors too

wagtail/wagtailadmin/static/wagtailadmin/css/components/forms.less

@@ -378,7 +378,8 @@ li.focused > .help{
     color:@color-red;
     clear:both;
 }
-.error input[type=text], .error input[type=email], .error input[type=tel], .error textarea, .error select, .error .tagit{
+
+.error input, .error textarea, .error select, .error .tagit{
     border-color:@color-red;
     background-color:@color-input-error-bg;
 }