It’s the kind of bugs that are really annoying, small, but time consuming, because there is always one bullshit option somewhere to switch it.

This is this kind of problem.

So, my highlighting disappeared, I don’t know if I pressed something or what,but simply, no .js / .php / .html had proper colored syntax and no code analysis was available.

The solution

Actually, really simple.

In bottom right corner there is an icon of inspector – click on it.
move the slider to syntax or inspections
wait a second or two for inspections

see the screenshot here