Revert "[added] Ability to send up to 3 buttons on MessageBox SUI.  (Temporary until SUI restructuring is finished.) [added] Structured LUA SUI sending of messagebox-type similar to listbox-type, to allow for up to 3 button messageboxes."

This reverts commit c9370eb1e5f0bc08c8f9ab730d8f44ea41036c39.

Change-Id: Icae91b8e187a4632079fa0b42be048ff8b85d868
Merge "Revert "[added] Ability to send up to 3 buttons on MessageBox SUI.  (Temporary until SUI restructuring is finished.) [added] Structured LUA SUI sending of messagebox-type similar to listbox-type, to allow for up to 3 button messageboxes."" into unstable