message: Fix missing full stop on translation key
diff: @@ -295,7 +295,7 @@ module.exports = React.createClass({
  title: _t("Sign out"),
  description:
  <div>
  - { _t("For security, logging out will delete any end-to-end encryption keys from this browser. If you want to be able to decrypt your conversation history from future Riot sessions, please export your room keys for safe-keeping") }.
  + { _t("For security, logging out will delete any end-to-end encryption keys from this browser. If you want to be able to decrypt your conversation history from future Riot sessions, please export your room keys for safe-keeping.") }.
  </div>,
  button: _t("Sign out"),
  extraButtons: [
  