3.11.2 - "The Oscar-Wilde-Sort"
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* Insert timestamps after some time of inactivity [Florian; #712248]
* Include backlog of previous conversations [Florian; #712249]
* Misc. bug fixes [Richard, Florian; #709848, #711217]

Contributors:
  Richard Hughes, Florian Müllner

Translations:
  Yosef Or Boczko [he], Rafael Ferreira [pt_BR], Jiri Grönroos [fi],
  Piotr DrÄ…g [pl], Joe Hansen [da]