can we have a highlighter-bar that you can move up and down with a key in landmarkslist?

when moved its selecting stuff like you would click with mouse on it, then you could use lock/unlock/secondary lock keypresses.
The  Bars position is not moving with resorting of the list. So if you place it to line 1, and sort the list by distance, it will always highlight the closest landmark to yourself.

together with the ability to filter and sort the landmark list you get this result:
a keybind to target
- closest enemy
- closest friendly
- closest ewar user
...