A main-threaded apartment is the first single-threaded apartment in the 
process. It was designed to be used for legacy applications that don't 
want to think about threading at all, even if they are always called 
from the same context, as is the case for regular STAs.

single-threaded apartment if executing in a multi-threaded apartment,
if one exists.

fixme if we should create it in an apartment of another type.

Fix a bug introduced while changing the OK/Cancel to Yes/No.

Also add the -multiply_defined suppress option for executables on MacOS.

Use string insensitive comparisons for property names.