Up/down arrows are locked

[Reinmar]

I recorded pressing:

• right (moves caret),
• left (moves caret),
• top/bottom (irreversibly changes item selection, locks the caret).

I don't think that up/down should be locked. But if you think it should, then at least the item selection should not be changed (if there's just one item).

[jodator]

I think that's a minor bug in selection cycling - the item is unselected but should not. You still can move caret and execute selected (even if not visually) item. Should be easy fix.

[Reinmar]

I just realised that we must be locking the up/down arrows because they are normally used to navigate in this panel :D That didn't occur to me initially.

So, yeah, let's fix selection cycling.