I am not aware of any way to do this and in the search, there may be more than one song showing, so by pressing [spacebar] or any other key to start play, it would not know which song to play. The mouse is required to click on a song in the search list to show in song view and having done this, then the spacebar would work.

However I will make a note of this and see if it is easy to implement something to help with this situation for the future but cannot promise anything at the moment.

I see there are small mouse devices (as well as trackpads etc.) but this one is very small and can operate in a small space, but there are presumably others.
https://www.swiftpoint.com/product/s...nt-gt-mouse-2/