Improved color scheme on testing status icons

[Flicksie]

I get that consistent colouring across the themes are cool and all. But theming what would be "functional colors" is actually detrimental to productivity. In the case of testing, we have the party popper/grave/skull icons for success/warn/failure icons which is really nice. but we're loosing the semaphore colors which are what is actually used for a quick glance and find errored tests.

Giving the option to leave those icons specifically alone would be a simple solution for that; ideally having them with the shapes but not theme-color them, as here the colors serve a functional purpose.