Dependencies: lib_2da, lib_anon, lib_array, lib_fn, lib_ini, lib_sfo, lib_sugar, lib_tools, lib_ui
Part of sfo-lua's core structure, this library hijacks many system calls used in menu.ui to run a bunch of functions if they are installed. (I do this in part so as to control function run order, irrespective of component install order.)
systemcall_patch()=() patch
ui_system_call_setup()=() action
Set up the system-call system, making appropriate menu edits and collecting data for lua libraries.