[ticket/12438] Add Template event memberlist_view_content_prepend

PHPBB3-12438
[ticket/12323] Template Event search_results_postprofile_before

PHPBB3-12323
Merge pull request #2346 from PayBas/ticket/12438

[ticket/12438] Add Template event memberlist_view_content_prepend

* PayBas/ticket/12438:
  [ticket/12438] Add Template event memberlist_view_content_prepend
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12438] Add Template event memberlist_view_content_prepend
Merge pull request #2203 from PayBas/ticket/12323

[ticket/12323] Template Event search_results_postprofile_before/after

* PayBas/ticket/12323:
  [ticket/12323] Template Event search_results_postprofile_before

Conflicts:
	phpBB/docs/events.md
Merge branch 'develop-ascraeus' into develop

* develop-ascraeus:
  [ticket/12323] Template Event search_results_postprofile_before