[I18N] Update translation terms from Transifex

addons/account/i18n/ro.po

addons/account/i18n/sk.po

addons/account_bank_statement_import/i18n/ro.po

addons/account_check_printing/i18n/ro.po

addons/base_vat/i18n/sl.po

addons/board/i18n/sk.po

addons/crm/i18n/sk.po

addons/crm/i18n/sl.po

addons/crm_livechat/i18n/sk.po

addons/event/i18n/he.po

addons/fleet/i18n/sk.po

addons/gamification_sale_crm/i18n/sk.po

addons/hr/i18n/sv.po

addons/hr_expense_check/i18n/ro.po

addons/im_livechat/i18n/ro.po

addons/mail/i18n/fi.po

addons/mail/i18n/ro.po

addons/mail/i18n/sl.po

addons/mail/i18n/sv.po

addons/mass_mailing/i18n/he.po