[ticket/10411] Add maxlength to category name input field

PHPBB3-10411
[ticket/10411] Revert database_update.php changes from for easier update

Revert the changes from 8fc022033a16b50aa07d06af8dc2a2508f0d94a6
* [ticket/10411] Update schema and fix database update

The database changes will be added as a migration in the next step

PHPBB3-10411