Well, one of the advantages of using a commercial product like IntelliJ is that the vendor (hopefully!) provides support.
However, I doubt very much that any
IDE is going to offer you a popup that shows possible Maven goals. Maven 1 did that, but Maven 2 cannot.
Unless I am very much mistaken, you can demand just about any goal you can hallucinate and Maven will attempt to download and execute a plugin to make it happen if it can. So the list of goals is effectively open-ended and thus cannot be enumerated.
It is both a strength and a weakness, as far as I am concerned, since it makes Maven operate by "magic", and I don't like magic when it comes to doing work. But it is nevertheless convenient.
The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.
You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.