(bug 27468) Move private styles out to their own section, so they override everything...

(bug 27468) Move private styles out to their own section, so they override everything except user styles. Moved from one makeResourceLoaderLink() call with array_merge() to multiple calls, because makeResourceLoaderLink() orders the modules, then groups them, so the input order is not preserved. Also fixed an issue in makeResourceLoaderLink() where the $uery variable was reused in each iteration but not cleared, allowing pollution to occur in theory (doesn't seem to have happened in practice, though).