Currently the search bar only displays the commands that match a search string. If the user clicks on a command, or presses ENTER, the command is not launched. So the user has to first discover the command in the search bar and then use the actual menu system to execute that command.
This is highly inefficient method.
Instead, let the user simply click on any search result to launch that command.
He should be able to select a command by pressing the arrow keys and then let him press ENTER to execute the selected command.