foreach error when drawing empty queue

bug #368047 reported by mkrakowiak: stray debug messages and dprint_r accidentally committed. caused and fixed by ezra-g

additional fixes for bug #321866: caching of subqueues causes failure of nodequeue_subqueue_add by andrewlevine and ezra-g

bug-fixing-feature #321866: API Improvement: caching of subqueues causes failure of nodequeue_subqueue_add by andrewlevine

backport of user interface improvement #306201 by wazdog: Sort allowed node types by display name, not internal name

Typo in message about workflow-ng and actions modules

#278733: Duplicate declarations of nodequeue_action_info resulting in WSoD. Reported by reubidium, Fixd by Amitaibu

#238182 by Scott Reynolds: use db_rewrite_sql() to ensure that nodequeue_fetch_random() always works.

#192265: Make nodequeue queue size text themeable. I'm not completely sure about doing this but I committed it anyhow.

#178583: Fix for size 1 queues. Also, fix for cached nodequeue position causing links to mistakenly show queue presence