If planner SAC rates are only in l/min don't claim otherwise in the manual

Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Show the cross hair only when planning or adding a dive

In normal profile mode it's rather redundant and clatters the profile.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>