How to make Alt-space working as in Emacs?

Typically I am an Emacs user on Linux. For an Android project I started using Android Studio on Windows, which is as far as I know the same as IntelliJ. One of the first customizations I did was changing the keymap to Emacs to get Ctrl-w and Ctrl-y working. It is not perfect but ok, but one shortcut is definitely missing: Alt-space.

In Emacs M-SPC (which is actually an alias for Alt-space) is bound to "just-one-space". The function collapses all spaces to just one. I use this function quite often, but Intellij opens just the context menu of the application. I know Windows users expect this to happen, but for me it is a pain.

How can I configure, that Intellij collapses spaces, when I hit Alt-space? It should be possible, because Emacs on Windows does it, too.

I am also missing Alt-x and Ctrl-h,k but that is another question...