Topic: Spotlight Panel: adding files using double-click, keyboard, modifiers
Currently (r887), the only way to add files in the search results of the Spotlight Panel is to either drag them to the playlist, or to select then click the "Add to Playlist" button.
1) Double-clicking songs in the search results should open or enqueue (depending on prefs).
2) Pressing Enter should open or enqueue (depending on prefs) selected songs.
3) The Command Control modifier (to reverse the pref) should work in both #1 and #2.
note: Right now, holding Command Control and clicking on a song in the search results will bring up the context menu. This should be prevented.