Fix bug 11274. Don't hold a lock on projectInfoMap for so long, fetching interesting mmp/bld.inf/etc list outside the lock instead. Add a temporary resource listener just in case resources are modified when we're not looking (I never saw this fire).

#include <basicheader.rh>

RESOURCE SIMPLE_TYPES r_test_choice_property_exists_no_text
	{
	long = 123;
	}