stack sizes: reduce stack sizes for modules that use sensor_combined

The sensor_combined topic got reduced from ~780 bytes to 72 bytes.

src/modules/commander/commander.cpp

@@ -297,7 +297,7 @@ int commander_main(int argc, char *argv[])
 		daemon_task = px4_task_spawn_cmd("commander",
 					     SCHED_DEFAULT,
 					     SCHED_PRIORITY_DEFAULT + 40,
-					     3600,
+					     3000,
 					     commander_thread_main,
 					     (char * const *)&argv[0]);