Don't launch unselected current item on pressing Enter
Don't launch unselected current item on pressing Enter

Fixes https://github.com/lxqt/lxqt/issues/534

Qt "activates" the current item (that has focus) on pressing `Enter` even when it isn't selected. However, launching an unselected item with `Enter` is not the behavior we expect from a file manager.

lxde/libfm-qt,lxde/libfm-qt