title: CLion: Keyboard cmd to switch between header and implementation files like in xcode
body: <p>In xcode I type cmd-shift up/down to switch between .h and .c files. How do I do that in CLion? Or more usefully, what would that action be called in the keymap? I don't find the keymap names terribly usefully named. None stand out for this purpose, including after the usual googling.</p>