Provide coloring to heads-up notification

[ajitid]

New keys are here: microsoft/vscode#28280

[jens1o]

That's cool, but personally, I lack of what we could do there... @Binaryify Thoughts?

[Binaryify]

will improve it

[ghost]

I will improve it after 1.21 version will be released. Because notifications UI was reworked. #194

[svipas]

@Binaryify this can be closed because all colorings in Notification Center are correct and like it's with the editor.

[Binaryify]

@svipben thank you for your help, I really appreciate it

[svipas]

@Binaryify No problem. This is the best theme for me, thank you for creating and maintaining it!