lots of improvements

atlas/models.py

@@ -1119,7 +1119,12 @@ class SeriesDetail(models.Model):
         ordering = ("sort_order",)
 
 class CaseDisplaySet(models.Model, AuthorMixin):
-    case = models.ForeignKey(Case, on_delete=models.CASCADE)
+    """
+    This is analogous to a SeriesFinding but for a Case (it has
+    access to all the series stacks).
+
+    """
+    case = models.ForeignKey(Case, on_delete=models.CASCADE, related_name="display_sets")
 
     name = models.CharField(
         max_length=255,
@@ -1142,6 +1147,10 @@ class CaseDisplaySet(models.Model, AuthorMixin):
         blank=True,
         help_text="Annotations for the display set",
     )
+
+    findings = models.ManyToManyField(Finding, blank=True)
+    structures = models.ManyToManyField(Structure, blank=True)
+    conditions = models.ManyToManyField(Condition, blank=True)