[Xenfocus] illuminate (dark) 2.2.12

• Upgraded for Xenforo 2.2.12.
• Fixed a Turkish language string in the guest message.
• Added Brazilian Portuguese phrases.
• The “Online statistics” widget on the “Current visitors” page is now using the correct icon.
• The “Mobile navigation bar?” setting in the Customizer no longer appears if the “Xenfocus: Mobile navigation bar > Enable mobile navigation bar?” setting is disabled.

update to 2.2.9

A minor change to the PAGE_CONTAINER template file, introduced in the 2.2.8 Xenforo update, was applied.