Implement i18n for push notifications
Summary
Adds i18n support for push notifications, and also includes spanish translations
Closes #1558
Important
Note that the extractor only detects calls to ->trans()
with a string as a parameter. This is not the case for variables (e.g. ->trans($var)
), so in that case you will have to make sure to add the entry manually in messages.en.xliff
Edited by Marcelo Rivera