Release v26.3.1

Fixed

• [controlVisibility]="{ print: false }" (and the standalone [showPrint]="false")
  now keeps the print button hidden after the document loads. PDF.js re-asserts its
  own hidden class on the print button on every load via its printingallowed
  handler, which wiped our hide and brought the icon back — most visibly with a Blob
  pdfSrc, whose fast local load lands after the hide. The viewer now hides buttons
  with a dedicated class PDF.js never touches, so the choice sticks. Thanks to
  @leominaudo for the report. (#373)