3.31.90
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Development release.

* App icon refresh (Jakub)
* Enable F10 hotkey for app menu (Jeremy)
* Fix crash when changing any option in Additional Layout Options
  after closing the dialog at least once (Carlos)

Contributors:
Jeremy Bicha, Carlos Soriano, Jakub Steiner

Translations:
 Pieter Schalk Schoeman [af], Marek Cernocky [cs], Efstathios Iosifidis [el]
 Daniel Mustieles [es], Jiri Grönroos [fi], Charles Monzat [fr],
 Fabio Tomat [fur], Fran Dieguez [gl], Kukuh Syafaat [id],
 Balázs Úr [hu], Ryuta Fujii [ja], Daniel Șerbănescu [ro]
 Anders Jonsson [sv], Sabri Ünal [tr]