3.30.0
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* Updates to GNOME Help (Gunnar Hjalmarsson, Michael Hill, Andre Klapper)
* Updated translations:
  ca        (Jordi Mas)
  cs        (Marek Cernocky)
  de        (Christian Kirbach, Mario Blättermann)
  es        (Oliver Gutiérrez, Daniel Mustieles)
  gl        (Marcos Lans)
  pl        (Piotr Drąg)
  pt_BR     (Rafael Fontenelle)
  sv        (Anders Jonsson)