[ticket/12262] Also find vars array when it's defined in the trigger_event()

PHPBB3-12262
[ticket/12262] Fix location list for acp events with "Locations:"

PHPBB3-12262
[ticket/11429] Increment asset version on Ext enable

PHPBB3-11429
Merge remote-tracking branch 'vsephpbb/ticket/11429' into develop

* vsephpbb/ticket/11429:
  [ticket/11429] Increment asset version on Ext enable
[ticket/12072] Fix comment about NEW MEMBERS permission

PHPBB3-12072
Merge remote-tracking branch 'Elsensee/ticket/12072' into develop-olympus

* Elsensee/ticket/12072:
  [ticket/12072] Fix comment about NEW MEMBERS permission
Merge branch 'develop-olympus' into develop

* develop-olympus:
  [ticket/12072] Fix comment about NEW MEMBERS permission
[ticket/12271] Decouple dropdown header and footer from #notifications_list

PHPBB3-12271
Merge pull request #2128 from nickvergessen/ticket/12271

[ticket/12271] Decouple dropdown header and footer from #notifications_list
[ticket/12272] Fix hardcoded colons in subforums.

In subforums list, under the parent forum description, there are two
harcoded colons instead of {L_COLON}.

PHPBB3-12272
[ticket/12272] Fix hardcoded colons in subforums.

In subforums list, under the parent forum description, there are two
harcoded colons instead of {L_COLON}.

PHPBB3-12272
[ticket/12262] Do not use getExtension()

The method is php 5.3.6+ only.

PHPBB3-12262
[ticket/12262] Do not use inline assignments

PHPBB3-12262
Merge remote-tracking branch 'maelsoucaze/develop' into develop

* maelsoucaze/develop:
  [ticket/12272] Fix hardcoded colons in subforums.
  [ticket/12272] Fix hardcoded colons in subforums.
Merge pull request #2111 from nickvergessen/ticket/12262

[ticket/12262] Fix event exporter

* nickvergessen/ticket/12262:
  [ticket/12262] Do not use inline assignments
  [ticket/12262] Do not use getExtension()
  [ticket/12262] Fix location list for acp events with "Locations:"
  [ticket/12262] Also find vars array when it's defined in the trigger_event()
[prep-release-3.1.0-b1] Update version to 3.1.0-b1
[prep-release-3.1.0-b1] Add migration for 3.1.0-b1
[prep-release-3.1.0-b1] Prepare Changelog
[prep-release-3.1.0-b1] Add changelog for 3.1.0-b1
[prep-release-3.1.0-b1] Update build version to 3.1.0-b2-dev