[XB] User Signature Ignore 2.1.0

• Added an account page for reviewing and filtering hidden signatures, accessible from account navigation and the visitor menu with inline actions for restoring multiple signatures at once and form for hiding signatures directly from account settings.
• Fixed signature visibility and action labels updating across all messages by the same member on the page.

XF 2.3 support

This add-on is now exclusively available with a paid supporter membership. By upgrading, you'll gain access to the complete collection of add-ons for your selected tier, available for use until your membership expires.

2.0.0 Patch Level 1:
- Fix: ignore button does not work if the user does not have permission to view the full profile