Made all squadron options collective

all MARS and options for a squadron are now all collective so it only
shows one model in the list view for playing, also all MARS etc that are
supposed to be min/max of one are now fixed so you don't have it
unselected with the option to select the "free" option an infinite
number of times. Also renamed all SAS to XXX Type (XXX is nation code)
and finalised the naming conventions for Attachments