Add a "Activate" (Enter) button

Hi!
i would like to have a new shortcut option.. i need the "Activate" action (the ENTER button on the keyboard)

I tell you why, i use vlc as a music playlist, so i navigate the list with next\preview buttons to highlight a music and i press ENTER to start that audio.. at the moment if i press Play vlc will play\pause the current song, not the highlighted