Add dark icon, for Windows light theme

[wojciechrak]

Hi!
First of all - greap app! I was thinking about writing sth like this myself, since MS is crippling Windows 10 functionality and forces some over-simplified ideas.

But here is the catch: app should use dark tray icon, when user has Light theme enabled.

Light theme is available in Windows Insider builds. I am using 1903, build 18356.1

[petrroll]

Unfortunately I've stopped development of this app so I (most probably) won't be looking at sorting this personally. Feel free to contribute a PR/create a fork, will be happy to help with that.

More info in #23

[petrroll]

relevant: #24

[7ooL]

would like to see this too, love the app but can see it in the icon tray.