WB 2.08.x

1. fixed error in finding languages/ dir, some little optimations, all in install/save.php

1. fixed HTTP_ACCEPT_ENCODING problem with Chrome in SecureForm.mtab.php
2. fixed Typo in SecureForm.mtab.php and SecureForm.php

- removed importSql() method from class WbDatabase
+ new class SqlImport added

! complete rebuild of wb/install/ - changed to use import-struct.sql
! change class WbDatabase from mysql to msqli
! rework of WbDatabase::importSql()
! function db_update_key_value() optimized for speed
! field `settings_id`removed from table `settings` and new primary key set to `name`...

1. typofix of class name in class.login and depending files

1. fixes from rev.2098/99

1. first fixes from rev.2098

! activate class Translate for all addons in admin/ (except pages/)
! class.admin >> add translation of the current theme to Translate

1. droplet >> [[SiteModified]] typo corrected
   ! upgrade-script.php >> new classes activated and little corrections
   ! WbAdaptor::getWbConstants() >> PageIconDir added

+ Translate::enablePrivateTable() allows to add more private language definitions
+ Translate::disablePrivateTable()
! TranslateAdaptorWbOldStyle move hardcoded foldername into a variable