Fixed EZP-20665 - Prioritized languages are not used by ez_render_field Twig helper

Fixes [EZP-20665](https://jira.ez.no/browse/EZP-20665).

## Tasks
* [x] Fix Twig helper to make it use prioritized languages
* [x] Fix UrlAliasService to make it list aliases in the right order (currently the main language is always the first one)

cc @pspanja