Fix OL layers not being in the correct draw order due to multiple async calls to LoadMap.php not being guaranteed to complete in the order they were dispatched.
Fix OL layers not being in the correct draw order due to multiple async calls to LoadMap.php not being guaranteed to complete in the order they were dispatched.

jumpinjackie/fusion-multimap,jumpinjackie/fusion-multimap,jumpinjackie/fusion-multimap