(MESS) apollo: Start modernizing/cleanup. [R. Belmont]
Fixed input regression in quizard and clones (nw)
started looking at some of the orphaned ROMdefs the clang fixes turned up.  I think one or two are genuine mistakes but still need to see if I have the files before I add the missing lines.

also split multfish into .c files and header, moving details of the sets where we only have reference info but there are no known dumps to a different file to avoid confusion.  (nw)
Factored out quit/confirmquit logic into ui_manager::request_quit()
Merging, simplifying logic
Using request_quit() on the new menu system; making confirming quit be the default