Update Handlebars.php
Add locales managment to UI
Remove asterisk markup from localization constants
Use english strings instead of keys for localization
Update Handlebars.php
Save unknown localization strings to the database
Make translation interface play nice with new localization system
Remove unneeded function "get_local_for_js"
Remove "get_locale_names" function
Fix title at the "operator/locales" page
Import localized messages when locale is enabled for the first time
Provide an ability to import translations
Rename "TranslationsImportController" to "TranslationImportController"
Do not automatically load translations from plugins

One shoud use translations import feature instead
Remove unused functions related with request processing
Remove unused "libs/common/forms.php" library
Use a function to load system configs
Remove unused "read_config_file" function
Make basic locale function work without database
Do not initialize database and load plugins during installation