Dark theme support

[hans-thomas]

I installed the latest rpm release on Fedora. It doesn't support dark theme.

[valdeirsapara]

installei também no .deb no ubuntu e não possue suporte também

[KaanAlper]

same issue

[FernandoGOT]

same here, installed with Ubuntu's App Center

[iyadbdch]

click on the down arrow next to minimize app > settings > themes, and choose a dark theme

[Yorisoft]

I have dark theme enabled in settings but its not fully supported. Its bugged.

[brawler2011]

Not working, arch linux

[JasonBenfrin]

You can click settings under the "v" menu and change theme there instead

#299
#299 (comment)