Enable file operations for a focused file

Could you please add an optional ability to use file operations (copy/move/rename/delete) for a file which has the focus rectangle IF there is no selection? This should make it possible to use Directory Opus for people who are used to Total Commander-like file managers (including me).
I had no luck in setting up Directory Opus to that mode. And yes, this is a continuation of my old topic Weird selection/focus mode