40.9
====
* Start tracking windows when expected by extensions [Florian; !2120]
* Fix timing issue on login screen [Naïm; !2116]
* Fix lightbox shader compatibility with older drivers [Daniel; !2125]
* Fix activating apps with tracked OR windows [Florian; !2131]
* Fix banding issues with the vignette lightbox shader [Jonas; !2133]
* Fix keyboard navigation to windows/apps in overview [Florian; !2124]
* Fix stuck transition when using super-scroll gesture [kyte; !2135]
* Fix calendar events with custom timezone [Milan; !2145]
* Misc. bug fixes and cleanups [Jonas, Aleksandr, Florian, Leleat, Daniel,
 Mohammed, Razze, Carlos; !2097, !2047, !2118, !2121, !2113, !337, !2098,
 !2143, !2153, !2162, !1972, !2160, !2178, !1744]

Contributors:
 Milan Crha, Jonas Dreßler, Naïm Favier, Carlos Garnacho, Leleat,
 Aleksandr Mezin, Florian Müllner, Razze, Mohammed Sadiq, Daniel van Vugt,
 kyte