In-Portal

Merge of "in-portal/branches/5.2.x@16599" to "in-portal/branches/5.3.x@16597".

Conflicts:

• core/admin_templates/categories/categories_edit.tpl
• core/admin_templates/forms/form_edit_emails.tpl
• core/admin_templates/forms/forms_edit.tpl
• core/admin_templates/incs/form_blocks.tpl
• core/admin_templates/languages/email_template_edit.tpl
• core/admin_templates/mailing_lists/mailing_list_edit.tpl
• core/admin_templates/popups/translator.tpl
• core/admin_templates/promo_blocks/promo_block_edit.tpl
• core/admin_templates/regional/email_template_edit.tpl
• core/admin_templates/regional/languages_edit.tpl
• core/install/english.lang
• core/install/install_data.sql
• core/install/upgrades.css
• core/install/upgrades.sql
• core/kernel/constants.php
• core/kernel/utility/email.php
• core/kernel/utility/formatters/date_formatter.php
• core/units/categories/categories_event_handler.php
• core/units/email_queue/email_queue_eh.php
• core/units/email_templates/email_template_eh.php
• core/units/helpers/csv_helper.php
• core/units/helpers/deployment_helper.php
• core/units/helpers/mailing_list_helper.php
• core/units/helpers/skin_helper.php
• core/units/mailing_lists/mailing_list_eh.php