updates to strike missions; frontline operations invalid units placement fixed; minor UI updates

game/event/baseattack.py

@@ -32,6 +32,7 @@ class BaseAttackEvent(Event):
         if self.is_successfull(debriefing):
             if self.from_cp.captured:
                 self.to_cp.captured = True
+                self.to_cp.ground_objects = []
                 self.to_cp.base.filter_units(db.UNIT_BY_COUNTRY[self.attacker_name])
 
             self.to_cp.base.affect_strength(+self.STRENGTH_RECOVERY)