dropdown layout of proposals.

Show on one level only if anything to show.

Signed-off-by: Zeljko <zeljko@zwr.fi>
show tips only when search empty

Signed-off-by: Zeljko <zeljko@zwr.fi>
search cats and manus on two letters minimum

And do not show them all when empty, it is just too many.

Signed-off-by: Zeljko <zeljko@zwr.fi>