[ticket/11849] Move pagination code to class

PHPBB3-11849
[ticket/11849] Test validate_start and on_page

PHPBB3-11849
[ticket/11849] Remove pagination functions

The functions where changed in 3.1 anyway, so we can just delete them

PHPBB3-11849
[ticket/11849] Add service definition

PHPBB3-11849
[ticket/11849] Replace pagination in viewforum.php with class

PHPBB3-11849
[ticket/11849] Update pagination code in viewtopic.php

PHPBB3-11849
[ticket/11849] Remove old pagination test

PHPBB3-11849
[ticket/11849] Update pagination in viewonline.php

PHPBB3-11849
[ticket/11849] Update search and memberlist

PHPBB3-11849
[ticket/11849] Update UCP notifications and pm folder

PHPBB3-11849
[ticket/11849] Update rest of the UCP modules

PHPBB3-11849
[ticket/11849] Update some ACP modules with new pagination

PHPBB3-11849
[ticket/11849] Update more MCP calls to pagination class

PHPBB3-11849
[ticket/11849] Fix more function calls

PHPBB3-11849
Merge remote-tracking branch 'nickvergessen/feature/pagination-class' into develop

# By Joas Schilling
# Via Joas Schilling
* nickvergessen/feature/pagination-class:
  [ticket/11849] Fix more function calls
  [ticket/11849] Update more MCP calls to pagination class
  [ticket/11849] Update some ACP modules with new pagination
  [ticket/11849] Update rest of the UCP modules
  [ticket/11849] Update UCP notifications and pm folder
  [ticket/11849] Update search and memberlist
  [ticket/11849] Update pagination in viewonline.php
  [ticket/11849] Remove old pagination test
  [ticket/11849] Update pagination code in viewtopic.php
  [ticket/11849] Replace pagination in viewforum.php with class
  [ticket/11849] Add service definition
  [ticket/11849] Remove pagination functions
  [ticket/11849] Test validate_start and on_page
  [ticket/11849] Move pagination code to class
[ticket/11911] Warn admins when there is no search index for the selected engine

PHPBB3-11911
Merge remote-tracking branch 'nickvergessen/ticket/11911' into develop

# By Joas Schilling
# Via Joas Schilling
* nickvergessen/ticket/11911:
  [ticket/11911] Warn admins when there is no search index for the selected engine