Fix placeholder text not translating bug

Created by: Tirokk

Authored by mattwr18 May 28, 2019 Merged May 29, 2019

---

• tiptap-extensions are not reactive
• we must call a method to change them dynamically
• emit changeLanguage event, which is listened for by the Editor component, which then calls a method to set the emptyNodeText of tiptap

🍰 Pullrequest

Issues

• fixes #583 (closed)