Revert "Detect if rewriting is enable or not and adapt the admin url"

This reverts commit 6cc3417b7bb09144022cedaf9d8898f1384db40d.
Revert "    Typo in FR language on "Choisissez""

This reverts commit 2f470b3b42c84b4081b81166bcd50ab7408e2b53.