Global

Add save current language in admin forms.
Fix Horizontal scrolling in admin panel.
Fix save category/project/version params.
Fix Empty alias after save category/project/version.

Projects

Add demo url.

Versions

Fix project download link.
Add nl2br in version changelog.

Duplicates protection

Fix cyclic redirection.
Fix set canonical link in multilangauge site.
Add Disable `Duplicates protection` parameter.