Since the introduction of injuries, the medicines icon atop the world map no longer gives any info relevant to the recovery of hit points (since medicines are no longer needed to recover these). However, it is sometimes the case that several mercs lose lots of hit points in a battle without sustaining any injuries, and then you head into another battle, not realizing that it’ll take another day or so before all hit points are back to 100%.
Could info on hit points be added atop the world map via another icon, or just added back to the medicines one?