Fix bug when people view sets from the course (i.e., existing hw sets).

Before, they were sorted by name, this keeps the problems in the order
they appear in the problem set.

lib/WeBWorK/ContentGenerator/Instructor/SetMaker.pm

@@ -1324,7 +1324,8 @@ sub pre_header_initialize {
 				push @pg_files, $problemRecord->source_file;
 
 			}
-			@pg_files = sortByName(undef,@pg_files);
+			# Don't sort, leave them in the order they appeared in the set
+			#@pg_files = sortByName(undef,@pg_files);
 			@pg_files = map {{'filepath'=> $_, 'morelt'=>0}} @pg_files;
 			$use_previous_problems=0;
 		}