Show different status when checker gives partial points

[MasloMaslane]

Many people complain that when the checker doesn’t give full points, it’s barely recognizable from the status color and description.

Change the status from OK when checker doesn’t give full points for a test, for example Partial OK. Maybe also the color should be different, because now it’s just slightly different from OK’s green.

[kostka-dev]

#166 🤔

[sylwia-sapkowska]

Example view.