40.6
====
* Fix sound-file support in notifications [Florian; !1991]
* Fix high-contrast switches [Florian; !2000]
* Only allow one extension prefs dialog at a time [Florian; #4564]
* Fixed crash [Sebastian; !2014]
* Misc. bug fixes and cleanups [Florian; !1998, !2007]
Contributors:
Sebastian Keller, Florian Müllner
Translators:
Yuri Chornoivan [uk], Matej Urbančič [sl], Anders Jonsson [sv],
Rafael Fontenelle [pt_BR], Kukuh Syafaat [id], Hugo Carvalho [pt],
Christian Kirbach [de]