Fix inventory view display issues with campaigns having both timed and sub-based drops

inventory.py

@@ -370,7 +370,7 @@ class DropsCampaign:
 
     @cached_property
     def finished(self) -> bool:
-        return all(d.is_claimed for d in self.drops)
+        return all(d.is_claimed or d.required_minutes <= 0 for d in self.drops)
 
     @cached_property
     def claimed_drops(self) -> int: