FYI this works on the windows version of IDEA, just not the Linux version. This has been a bug on the Linux version for a long time! You can test it on almost any version out there.
In my test case I typed List a; and IDEA asks to import List, and since there are multiple choices it pops up a window asking me to choice which package to import. The problem is the focus isn't on the new window. So I can't simply select the package and hit enter on it. Instead I have to use the mouse to select the correct one.
Test Case
public class Test {
public static void main(String[] args) {
List a;
}
}
I recently switched to Ubuntu this is really annoying, having to use the mouse every time I need to import some class.
This is one of those small issues that really destroys the "Develop with pleasure" slogan...