For those with the fortitude there is a way!!! If you install AutoHotKeys on the machine where MC is running the following code does just what I need. There is some setup required to get the AutoHotKeys running, particularly if the machine Controlling MC is Windows 10 but it is not terribly difficult.
^z::
MouseClick, left
MouseClick, left
Return
Now select a track or album and enter ^z. This action adds the selection now playing list. I know a dbl-clk works as well but to use it you must select the music (one lft clk) then dbl-clk the selected item. I am running the MC through a terminal emulator, TightVNC, from a windows 10 laptop with a fairly small screen. Using the ^z operation is much easier, particularly for my wife, whom I am encouraging to use the system.