The language dropdown list in the list of node's aliases should only contain the languages that the object exists in. Currently the dropdown contains all translation languages (those listed in Setup - Languages in the admin interface), even though the object is not always available and ShowUntranslatedObjects=disabled for the admin siteaccess.

Steps to reproduce

1. Select English, Norwegian and Russian as site languages during eZP installation.
2. Create an object that exists only in English and Russian languages.
3. View the object and make sure you uncheck the "Use the main language if there is no prioritized translation" checkbox in the "Translations" window (i.e. make sure the object is not always available).
4. Settings specified for the admin siteaccess are:

[RegionalSettings]
ShowUntranslatedObjects=disabled
SiteLanguageList[]=eng-GB
SiteLanguageList[]=nor-NO
SiteLanguageList[]=rus-RU

5. Select "Advanced - Manage URL aliases" from the node's context menu.
6. The language dropdown in the list of node's aliases contains English, Norwegian and Russian. Expected behavior: should only contain English and Russian.