[ticket/12908] Fix operator typo in increment.php

PHPBB3-12908
[ticket/12909] Use correct lang vars in cli extension enable

PHPBB3-12909
Merge pull request #2792 from n-aleha/ticket/12908

[ticket/12908] Fix operator typo in increment.php

* n-aleha/ticket/12908:
  [ticket/12908] Fix operator typo in increment.php
Merge pull request #2793 from n-aleha/ticket/12909

[ticket/12909] Use correct lang vars in cli extension enable

* n-aleha/ticket/12909:
  [ticket/12909] Use correct lang vars in cli extension enable
[ticket/12911] Add imageset sprite

PHPBB3-12911
[ticket/12911] Convert dl.icon to .row-icon

PHPBB3-12911
[ticket/12911] Positon the icons

PHPBB3-12911
[ticket/12911] Animate hot icons

PHPBB3-12911
[ticket/12911] Fix alignment

PHPBB3-12911
[ticket/12911] Fix topic icons

PHPBB3-12911
[ticket/12911] Fix mobile

PHPBB3-12911
[ticket/12911] Remove old icons

PHPBB3-12911
[ticket/12911] Add dl.icon back for copatabiliy

PHPBB3-12911