[ticket/13066] Add search results core event to modify search title

PHPBB3-13066
Merge pull request #2952 from rxu/ticket/13066

[ticket/13066] Add search results core event to modify search title

* rxu/ticket/13066:
  [ticket/13066] Add search results core event to modify search title
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/13066] Add search results core event to modify search title