458 - Keyframe widget indicator (arrow) enhancements - kf name on toolip2

- Code readability,  add ( ) around kf name test
458 - Keyframe widget indicator (arrow) enhancements - micro Performance

- do not perform any operation if the key frame list is empty
Fix 626 - Key frame name losted on key frame move

- affect Widget_Keyframe_List::selected_kf description in any
case inside Widget_Keyframe_List::set_selected_keyframe