zsh:keys:cmd-on-enter: Add reset on other command

If a command is normally executed CMD_ON_ENTER is reseted to `ls`.
Otherwise problems can occur when for example switching the directory to
a non-repo when CMD_ON_ENTER contains `gs`.

.config/zsh/zshrc.d/60-keys.zsh

@@ -111,6 +111,9 @@ function cmd-on-enter {
 			gs)
 				CMD_ON_ENTER='ls';;
 		esac
+	else
+		# Reset if other command is executed
+		CMD_ON_ENTER=ls
 	fi
 	zle accept-line