I'm trying to find a nice VS feature "Track Active Item in SOlution Explorer" analog in IDEA. For those who doesn't know - when I switch between files in the main area, VS will highlight the corresponding item in Solution Explorer ("Projects" pane in IDEA).
Since 2020.1 version the option is called Always Select Opened File:
For the previous versions:
In the Project View there is Autoscroll from Source option when you click on the "gear" icon: