xF2 Add-on Brivium - Support Ticket System 3.2.1

### Fixed
- Call to undefined method: getBreadcrumbs
- Template error: Template public:mjst_alert_support_ticket_new_ticket
- Template error: Method isFirstPost is not callable

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### Added
- Email piping feature.
### Fixed
- XSS vulnerability.
- Predefined reply.
- Minor bug fixes.

Added
- The sitemap for Knowledge Base and Category.
- Category list at sidebar in Knowledge Base and Category pages.
- Option to send new reply notification for Guest.
Improvement
- Metadata for Knowledge Base and Category.
Fixed
- Minor bug fixes.