Refactor the Menu Manager to Use Queues and Implement SDL-0268 (Menu Updating & Pagination) and Implement SDL-0148 (Additional SubMenus)

[joeljfischer]

Bug Report

The Menu Manager currently doesn't implement two features supported by RPCs:

• SDL-0268 - Menu Menu Updating and Pagination
• SDL-0148 - Additional SubMenus

Additionally, the menu manager is one of the last managers to not be updated to use a queue system to manage complexity.