[ticket/14831] Make sure migrations always start with backslash
* marc1706/ticket/14831:
[ticket/14831] Rename migration and replace preg_replace() with simpler methods
[ticket/14831] Compare depends_on for migrations and remove prefixless names
[ticket/14831] Add migration for deduplicating entries and fix typo
[ticket/14831] Add method for getting valid migration name
[ticket/14831] Fall back to possible migration names instead of adding prefix
[ticket/14831] Make sure migrations always start with backslash
Tracker ticket (set the ticket ID to your ticket ID):
https://tracker.phpbb.com/browse/PHPBB3-14859
This addresses the problem that notifications of new PM reports were not sent out to moderators that weren't global moderators but did have the permission "Can close/delete PM reports".
PHPBB3-14859
[ticket/14795] Use maximum topic views instead of adding up views in merge
* github.com:phpbb/phpbb:
[ticket/14795] Use maximum topic views instead of adding up views in merge
[ticket/11483] Generate user act key if database entry is empty
* github.com:phpbb/phpbb:
[ticket/11483] Add tests for generating user act key on force reactivate
[ticket/11483] Generate user act key if database entry is empty
[ticket/14831] Fix extension modules installation issues
* rxu/ticket/14831:
[ticket/14831] Optimize code construction
[ticket/14831] Add more tests against UCP modules
[ticket/14831] Add more tests, better name for $e placeholder
[ticket/14831] Do not throw exception on the module existence checking
[ticket/14831] Fix module migrator tool
Instead of just adding the backslash as prefix if needed, this will take care
of falling back to any possible migration with or without backslash no matter
how the mgiration was saved in the database or called in the migrations file.
This will result in a more robust migrator in regards to naming the migrations
and previously run migrations.
PHPBB3-14831
The migration system expects every migration to start with a backslash.
If depends on definitions do not supply that leading backslash, we should
make sure it's added manually before calling the depends on migration.
PHPBB3-14831
The force reactivation action in the ACP will no longer overwrite the
generated activation key in case the key stored in the database is empty.
It will also save the generated key back to the database to actually allow
the activation by the user.
PHPBB3-11483
