[ticket/12478] Re-add contact field events in ucp_pm_viewmessage.html.

PHPBB3-12478
[ticket/12478] Add contact field events to viewtopic_body.html.

PHPBB3-12478
[ticket/12480] Only load config/routing.yml from extensions route

PHPBB3-12480
[ticket/12480] Add subfolder/config/routing.yml which should not be found

PHPBB3-12480
[ticket/12480] Remove unused use statements

PHPBB3-12480
Merge pull request #2388 from nickvergessen/ticket/12480

[ticket/12480] Only load config/routing.yml from extensions route

* nickvergessen/ticket/12480:
  [ticket/12480] Remove unused use statements
  [ticket/12480] Add subfolder/config/routing.yml which should not be found
  [ticket/12480] Only load config/routing.yml from extensions route
Merge pull request #2385 from prototech/ticket/12478

Add contact field before/after events.