[ticket/12612] Prefix show_profile() with phpbb and delete unused global

PHPBB3-12612
[ticket/12612] Prefix _sort_last_active() with phpbb_

PHPBB3-12612
[ticket/12612] Prefix custom UCP module function with phpbb_

PHPBB3-12612
[ticket/12612] Prefix handle_post_delete() with phpbb and remove unused global

PHPBB3-12612
[ticket/12612] Prefix upload_popup() with phpbb_

PHPBB3-12612
[ticket/12612] Prefix module url functions with phpbb_

PHPBB3-12612
[ticket/12612] Prefix get_*_data() with phpbb_ and delete unused global

PHPBB3-12612
[ticket/12612] Prefix mcp_sorting() with phpbb_

PHPBB3-12612
[ticket/12612] Prefix check_ids() with phpbb_

PHPBB3-12612
Merge remote-tracking branch 'github-nickvergessen/ticket/12612' into develop-ascraeus

* github-nickvergessen/ticket/12612:
  [ticket/12612] Prefix check_ids() with phpbb_
  [ticket/12612] Prefix mcp_sorting() with phpbb_
  [ticket/12612] Prefix get_*_data() with phpbb_ and delete unused global
  [ticket/12612] Prefix module url functions with phpbb_
  [ticket/12612] Prefix upload_popup() with phpbb_
  [ticket/12612] Prefix handle_post_delete() with phpbb and remove unused global
  [ticket/12612] Prefix custom UCP module function with phpbb_
  [ticket/12612] Prefix _sort_last_active() with phpbb_
  [ticket/12612] Prefix show_profile() with phpbb and delete unused global