Problem with menu_links after page manager

Updated issue summary.

I found the reason why I couldn't translate menu link and this is really cryptic!

[Screenshot-guy Mode On]
See anything? No, it's virgin clean:

Let's click on "Normal menu entry":

See the title is not empty? It equals to: "Конкурс 2013", a value which was entered before, when for example, menu link was created but then — deleted. But anyway, looks pretty innocent, right? No, it's not. It is the title of the corresponding "menu_router" item (see the column to the right):

Now the menu_router item has the title, then menu_links are loaded by Drupal core, and they got $link['title'] from menu_router item title, and my particular link now has both 'link_title' and 'title' equals to the same value:

array(
..
  'link_title' => 'Конкурс 2013',
  'title' => 'Конкурс 2013',
)

I'm yet to get around to the actual reason why this makes i18n to stop finding this as a translatable "menu" item string, but for example _menu_item_localize() makes difference:

i.e. when title = link_title, it behaves differently.

[Screenshot-guy Mode Off]

IMHO, the 'hidden' naming of menu_router item by page manager is the bug. Steps to reproduce:

1) Open a panel
2) Enable "Normal menu entry" but don't save the panel!
3) Enter the title
4) Now switch it back to "No menu entry"
5) Save the panel
6) menu_router item is updated and got the title.

While this has no relation to CTools, just to finish the story, I found the code responsible for not allowing my link translation. It is from i18n_menu.module:

/**
 * Get localizable properties for menu link checking agains the router item.
 */
function _i18n_menu_link_localizable_properties($link) {
  $props = array();
  $router = !empty($link['router_path']) ? _i18n_menu_get_router($link['router_path']) : NULL;
  if (!empty($link['link_title'])) {
    // If the title callback is 't' and the link title matches the router title
    // it will be localized by core, not by i18n_menu.
    if (!$router ||
        (empty($router['title_callback']) || $router['title_callback'] != 't') ||
        (empty($router['title']) || $router['title'] != $link['link_title'])
    ) {
      $props[] = 'title';
    }
  }
  if (!empty($link['options']['attributes']['title'])) {
    // If the description matches the router description, it will be localized
    // by core.
    if (!$router || empty($router['description']) || $router['description'] != $link['options']['attributes']['title']) {
      $props[] = 'description';
    }
  }
  return $props;
}

i.e. if a menu link title matches router title it's not added to the strings of i18n_menu.

Updated issue summary.