Feature: #103740 - Language selection for backend module "Status - Pagetree Overview" 

See forge#103740

Description 

The backend module Content > Status > Pagetree Overview has been enhanced with a language selection option.

This change makes it possible to switch the displayed page tree to the selected language and adjust all labels, as well as edit and view links, accordingly.

The language selection dropdown is located next to the other filter options (recursion depth, information type) and complements the Content > Status > Localization Overview module by providing a page- and record-focused view.

Impact 

The Content > Status backend module is now more useful for sites with multiple languages, offering a quick overview of information for the selected page and its subpages in the chosen language.