Allow to access to any existing translation of a page

It's not possible right now to access any translation of a page, only the translations that are in a supported language.

Reproduction step:

• Setup a wiki to allow multi language and set French and English for supported languages
• Try to access to any other translation of Sandbox page (e.g. russian, italian, etc)

Obtained result:

• Only french and english languages are displayed, even when clicking on the translation page from the breadcrumb (cf attached screenshot)

Expected result:

• Any linked page from the breadcrumb should be reachable