[feature] Update modern icons

[1280px]

Current modern icons are pretty nice, but they don't support dark mode and also don't fit with current Windows 10/11 UI at all!

I can suggest use this iconset - it fits pretty good with current Windows UI and can be easily transported to any size or color because of .svg format.

Here's my concept of PH with new icons based on iconset above with tiny toolbar UI fixes (can we get rid of this horrible 1px white line in dark mode pleeeease?)

UPD: I found out Microsoft has a HUGE free-to-use Fluent icons collection on GitHub: https://github.com/microsoft/fluentui-system-icons, which makes things even better :D