3.17.90
=======
* Avoid caret/focus viewport changes during pointer movement [Rui; #752138]
* Match GTK+'s modal dialogs for system modal dialogs [Carlos; #746108]
* Refine message list style [Florian; #749958]
* Fix type-ahead behavior for backspace and compose key [Rui; #753319, #753320]
* Refine the system status menu [Florian; #751377]
* Misc. bug fixes and cleanups [Bastien, Ray, Florian, Jakub; #752779, #752739,
  #741366, #651503, #753064, #753181, #752881]

Contributors:
  Rui Matos, Florian Müllner, Bastien Nocera, Carlos Soriano, Jakub Steiner,
  Ray Strode, Rico Tzschichholz

Translations:
  Marek Černocký [cs], Kjartan Maraas [nb], Jordi Mas [ca], Muhammet Kara [tr],
  Enrico Nicoletto [pt_BR]