Localize default "empty" value and status (deprecated, optional, required)

* Fixed 'should be not be'  in other 'qqq' messages.
* Fixed absence of ->text() in other wfMessage uses
  (defaulted to parse, which was wrong as these are Html::element
  uses that take text input, so it was being double escaped).

Bug: 50370
Change-Id: Iba1a10f14e258a588435cd03017177acfb96d0f3
Merge "Localize default "empty" value and status (deprecated, optional, required)"