<li data-email="{{this.email}}" class="typing_notification">{{this.full_name}} is typing...</li>

<li data-email="{{this.email}}" class="typing_notification">{{#tr this}}__full_name__ is typing...{{/tr}}</li>

Add missing translation tags to typing notifications.
i18n: Add missing translation tags to typing notifications.

Thanks to Andrea Soc for the report.
